$ /nix/store/9ypz3flqsrl5xl495mm8h645gadjsxi1-coreutils-9.11/bin/timeout --kill-after=15s 7200s /nix/store/23zk8sgzamrbmj1fday15szf7f2279s8-nix-2.34.7/bin/nix --extra-experimental-features nix-command --extra-experimental-features flakes flake clone git+https://github.com/alphal00p/gammaloop --dest /tmp/nix-ci-worker/stable-pwd/repo/ Cloning into '/tmp/nix-ci-worker/stable-pwd/repo'... remote: Enumerating objects: 77432 remote: Enumerating objects: 86559, done. remote: Counting objects: 0% (1/9127) remote: Counting objects: 1% (92/9127) remote: Counting objects: 2% (183/9127) remote: Counting objects: 3% (274/9127) remote: Counting objects: 4% (366/9127) remote: Counting objects: 5% (457/9127) remote: Counting objects: 6% (548/9127) remote: Counting objects: 7% (639/9127) remote: Counting objects: 8% (731/9127) remote: Counting objects: 9% (822/9127) remote: Counting objects: 10% (913/9127) remote: Counting objects: 11% (1004/9127) remote: Counting objects: 12% (1096/9127) remote: Counting objects: 13% (1187/9127) remote: Counting objects: 14% (1278/9127) remote: Counting objects: 15% (1370/9127) remote: Counting objects: 16% (1461/9127) remote: Counting objects: 17% (1552/9127) remote: Counting objects: 18% (1643/9127) remote: Counting objects: 19% (1735/9127) remote: Counting objects: 20% (1826/9127) remote: Counting objects: 21% (1917/9127) remote: Counting objects: 22% (2008/9127) remote: Counting objects: 23% (2100/9127) remote: Counting objects: 24% (2191/9127) remote: Counting objects: 25% (2282/9127) remote: Counting objects: 26% (2374/9127) remote: Counting objects: 27% (2465/9127) remote: Counting objects: 28% (2556/9127) remote: Counting objects: 29% (2647/9127) remote: Counting objects: 30% (2739/9127) remote: Counting objects: 31% (2830/9127) remote: Counting objects: 32% (2921/9127) remote: Counting objects: 33% (3012/9127) remote: Counting objects: 34% (3104/9127) remote: Counting objects: 35% (3195/9127) remote: Counting objects: 36% (3286/9127) remote: Counting objects: 37% (3377/9127) remote: Counting objects: 38% (3469/9127) remote: Counting objects: 39% (3560/9127) remote: Counting objects: 40% (3651/9127) remote: Counting objects: 41% (3743/9127) remote: Counting objects: 42% (3834/9127) remote: Counting objects: 43% (3925/9127) remote: Counting objects: 44% (4016/9127) remote: Counting objects: 45% (4108/9127) remote: Counting objects: 46% (4199/9127) remote: Counting objects: 47% (4290/9127) remote: Counting objects: 48% (4381/9127) remote: Counting objects: 49% (4473/9127) remote: Counting objects: 50% (4564/9127) remote: Counting objects: 51% (4655/9127) remote: Counting objects: 52% (4747/9127) remote: Counting objects: 53% (4838/9127) remote: Counting objects: 54% (4929/9127) remote: Counting objects: 55% (5020/9127) remote: Counting objects: 56% (5112/9127) remote: Counting objects: 57% (5203/9127) remote: Counting objects: 58% (5294/9127) remote: Counting objects: 59% (5385/9127) remote: Counting objects: 60% (5477/9127) remote: Counting objects: 61% (5568/9127) remote: Counting objects: 62% (5659/9127) remote: Counting objects: 63% (5751/9127) remote: Counting objects: 64% (5842/9127) remote: Counting objects: 65% (5933/9127) remote: Counting objects: 66% (6024/9127) remote: Counting objects: 67% (6116/9127) remote: Counting objects: 68% (6207/9127) remote: Counting objects: 69% (6298/9127) remote: Counting objects: 70% (6389/9127) remote: Counting objects: 71% (6481/9127) remote: Counting objects: 72% (6572/9127) remote: Counting objects: 73% (6663/9127) remote: Counting objects: 74% (6754/9127) remote: Counting objects: 75% (6846/9127) remote: Counting objects: 76% (6937/9127) remote: Counting objects: 77% (7028/9127) remote: Counting objects: 78% (7120/9127) remote: Counting objects: 79% (7211/9127) remote: Counting objects: 80% (7302/9127) remote: Counting objects: 81% (7393/9127) remote: Counting objects: 82% (7485/9127) remote: Counting objects: 83% (7576/9127) remote: Counting objects: 84% (7667/9127) remote: Counting objects: 85% (7758/9127) remote: Counting objects: 86% (7850/9127) remote: Counting objects: 87% (7941/9127) remote: Counting objects: 88% (8032/9127) remote: Counting objects: 89% (8124/9127) remote: Counting objects: 90% (8215/9127) remote: Counting objects: 91% (8306/9127) remote: Counting objects: 92% (8397/9127) remote: Counting objects: 93% (8489/9127) remote: Counting objects: 94% (8580/9127) remote: Counting objects: 95% (8671/9127) remote: Counting objects: 96% (8762/9127) remote: Counting objects: 97% (8854/9127) remote: Counting objects: 98% (8945/9127) remote: Counting objects: 99% (9036/9127) remote: Counting objects: 100% (9127/9127) remote: Counting objects: 100% (9127/9127), done. remote: Compressing objects: 0% (1/2107) remote: Compressing objects: 1% (22/2107) remote: Compressing objects: 2% (43/2107) remote: Compressing objects: 3% (64/2107) remote: Compressing objects: 4% (85/2107) remote: Compressing objects: 5% (106/2107) remote: Compressing objects: 6% (127/2107) remote: Compressing objects: 7% (148/2107) remote: Compressing objects: 8% (169/2107) remote: Compressing objects: 9% (190/2107) remote: Compressing objects: 10% (211/2107) remote: Compressing objects: 11% (232/2107) remote: Compressing objects: 12% (253/2107) remote: Compressing objects: 13% (274/2107) remote: Compressing objects: 14% (295/2107) remote: Compressing objects: 15% (317/2107) remote: Compressing objects: 16% (338/2107) remote: Compressing objects: 17% (359/2107) remote: Compressing objects: 18% (380/2107) remote: Compressing objects: 19% (401/2107) remote: Compressing objects: 20% (422/2107) remote: Compressing objects: 21% (443/2107) remote: Compressing objects: 22% (464/2107) remote: Compressing objects: 22% (484/2107) remote: Compressing objects: 23% (485/2107) remote: Compressing objects: 24% (506/2107) remote: Compressing objects: 25% (527/2107) remote: Compressing objects: 26% (548/2107) remote: Compressing objects: 27% (569/2107) remote: Compressing objects: 28% (590/2107) remote: Compressing objects: 29% (612/2107) remote: Compressing objects: 30% (633/2107) remote: Compressing objects: 31% (654/2107) remote: Compressing objects: 32% (675/2107) remote: Compressing objects: 33% (696/2107) remote: Compressing objects: 34% (717/2107) remote: Compressing objects: 35% (738/2107) remote: Compressing objects: 36% (759/2107) remote: Compressing objects: 37% (780/2107) remote: Compressing objects: 38% (801/2107) remote: Compressing objects: 39% (822/2107) remote: Compressing objects: 40% (843/2107) remote: Compressing objects: 41% (864/2107) remote: Compressing objects: 42% (885/2107) remote: Compressing objects: 43% (907/2107) remote: Compressing objects: 44% (928/2107) remote: Compressing objects: 45% (949/2107) remote: Compressing objects: 46% (970/2107) remote: Compressing objects: 47% (991/2107) remote: Compressing objects: 48% (1012/2107) remote: Compressing objects: 49% (1033/2107) remote: Compressing objects: 50% (1054/2107) remote: Compressing objects: 51% (1075/2107) remote: Compressing objects: 52% (1096/2107) remote: Compressing objects: 53% (1117/2107) remote: Compressing objects: 54% (1138/2107) remote: Compressing objects: 55% (1159/2107) remote: Compressing objects: 56% (1180/2107) remote: Compressing objects: 57% (1201/2107) remote: Compressing objects: 58% (1223/2107) remote: Compressing objects: 59% (1244/2107) remote: Compressing objects: 60% (1265/2107) remote: Compressing objects: 61% (1286/2107) remote: Compressing objects: 62% (1307/2107) remote: Compressing objects: 63% (1328/2107) remote: Compressing objects: 64% (1349/2107) remote: Compressing objects: 65% (1370/2107) remote: Compressing objects: 66% (1391/2107) remote: Compressing objects: 67% (1412/2107) remote: Compressing objects: 68% (1433/2107) remote: Compressing objects: 69% (1454/2107) remote: Compressing objects: 70% (1475/2107) remote: Compressing objects: 71% (1496/2107) remote: Compressing objects: 72% (1518/2107) remote: Compressing objects: 73% (1539/2107) remote: Compressing objects: 74% (1560/2107) remote: Compressing objects: 75% (1581/2107) remote: Compressing objects: 76% (1602/2107) remote: Compressing objects: 77% (1623/2107) remote: Compressing objects: 78% (1644/2107) remote: Compressing objects: 79% (1665/2107) remote: Compressing objects: 80% (1686/2107) remote: Compressing objects: 81% (1707/2107) remote: Compressing objects: 82% (1728/2107) remote: Compressing objects: 83% (1749/2107) remote: Compressing objects: 84% (1770/2107) remote: Compressing objects: 85% (1791/2107) remote: Compressing objects: 86% (1813/2107) remote: Compressing objects: 87% (1834/2107) remote: Compressing objects: 88% (1855/2107) remote: Compressing objects: 89% (1876/2107) remote: Compressing objects: 90% (1897/2107) remote: Compressing objects: 91% (1918/2107) remote: Compressing objects: 92% (1939/2107) remote: Compressing objects: 93% (1960/2107) remote: Compressing objects: 94% (1981/2107) remote: Compressing objects: 95% (2002/2107) remote: Compressing objects: 96% (2023/2107) remote: Compressing objects: 97% (2044/2107) remote: Compressing objects: 98% (2065/2107) remote: Compressing objects: 99% (2086/2107) remote: Compressing objects: 100% (2107/2107) remote: Compressing objects: 100% (2107/2107), done. Receiving objects: 0% (1/86559) Receiving objects: 1% (866/86559) Receiving objects: 2% (1732/86559) Receiving objects: 3% (2597/86559) Receiving objects: 4% (3463/86559) Receiving objects: 5% (4328/86559) Receiving objects: 6% (5194/86559) Receiving objects: 7% (6060/86559) Receiving objects: 8% (6925/86559) Receiving objects: 9% (7791/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 10% (8656/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 11% (9522/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 12% (10388/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 13% (11253/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 14% (12119/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 15% (12984/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 16% (13850/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 17% (14716/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 18% (15581/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 19% (16447/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 20% (17312/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 21% (18178/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 22% (19043/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 23% (19909/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 24% (20775/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 25% (21640/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 26% (22506/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 27% (23371/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 28% (24237/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 29% (25103/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 30% (25968/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 31% (26834/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 32% (27699/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 33% (28565/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 34% (29431/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 35% (30296/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 36% (31162/86559), 11.89 MiB | 23.71 MiB/s Receiving objects: 36% (31444/86559), 28.54 MiB | 28.51 MiB/s Receiving objects: 37% (32027/86559), 28.54 MiB | 28.51 MiB/s Receiving objects: 38% (32893/86559), 28.54 MiB | 28.51 MiB/s Receiving objects: 39% (33759/86559), 28.54 MiB | 28.51 MiB/s Receiving objects: 40% (34624/86559), 28.54 MiB | 28.51 MiB/s Receiving objects: 41% (35490/86559), 28.54 MiB | 28.51 MiB/s Receiving objects: 42% (36355/86559), 28.54 MiB | 28.51 MiB/s Receiving objects: 43% (37221/86559), 28.54 MiB | 28.51 MiB/s Receiving objects: 44% (38086/86559), 28.54 MiB | 28.51 MiB/s Receiving objects: 45% (38952/86559), 28.54 MiB | 28.51 MiB/s Receiving objects: 46% (39818/86559), 45.15 MiB | 30.07 MiB/s Receiving objects: 47% (40683/86559), 45.15 MiB | 30.07 MiB/s Receiving objects: 48% (41549/86559), 45.15 MiB | 30.07 MiB/s Receiving objects: 49% (42414/86559), 45.15 MiB | 30.07 MiB/s Receiving objects: 50% (43280/86559), 45.15 MiB | 30.07 MiB/s Receiving objects: 51% (44146/86559), 45.15 MiB | 30.07 MiB/s Receiving objects: 52% (45011/86559), 45.15 MiB | 30.07 MiB/s Receiving objects: 53% (45877/86559), 45.15 MiB | 30.07 MiB/s Receiving objects: 54% (46742/86559), 45.15 MiB | 30.07 MiB/s Receiving objects: 55% (47608/86559), 45.15 MiB | 30.07 MiB/s Receiving objects: 56% (48474/86559), 45.15 MiB | 30.07 MiB/s Receiving objects: 56% (48747/86559), 61.57 MiB | 30.69 MiB/s Receiving objects: 57% (49339/86559), 61.57 MiB | 30.69 MiB/s Receiving objects: 58% (50205/86559), 61.57 MiB | 30.69 MiB/s Receiving objects: 59% (51070/86559), 61.57 MiB | 30.69 MiB/s Receiving objects: 60% (51936/86559), 61.57 MiB | 30.69 MiB/s Receiving objects: 61% (52801/86559), 61.57 MiB | 30.69 MiB/s Receiving objects: 62% (53667/86559), 61.57 MiB | 30.69 MiB/s Receiving objects: 63% (54533/86559), 78.35 MiB | 31.15 MiB/s Receiving objects: 64% (55398/86559), 78.35 MiB | 31.15 MiB/s Receiving objects: 65% (56264/86559), 78.35 MiB | 31.15 MiB/s Receiving objects: 66% (57129/86559), 78.35 MiB | 31.15 MiB/s Receiving objects: 66% (57370/86559), 94.65 MiB | 31.35 MiB/s Receiving objects: 67% (57995/86559), 94.65 MiB | 31.35 MiB/s Receiving objects: 68% (58861/86559), 94.65 MiB | 31.35 MiB/s Receiving objects: 69% (59726/86559), 94.65 MiB | 31.35 MiB/s Receiving objects: 70% (60592/86559), 94.65 MiB | 31.35 MiB/s Receiving objects: 71% (61457/86559), 111.58 MiB | 31.71 MiB/s Receiving objects: 72% (62323/86559), 111.58 MiB | 31.71 MiB/s Receiving objects: 73% (63189/86559), 111.58 MiB | 31.71 MiB/s Receiving objects: 74% (64054/86559), 111.58 MiB | 31.71 MiB/s Receiving objects: 74% (64312/86559), 128.39 MiB | 31.89 MiB/s Receiving objects: 75% (64920/86559), 128.39 MiB | 31.89 MiB/s Receiving objects: 76% (65785/86559), 128.39 MiB | 31.89 MiB/s Receiving objects: 77% (66651/86559), 128.39 MiB | 31.89 MiB/s Receiving objects: 78% (67517/86559), 128.39 MiB | 31.89 MiB/s Receiving objects: 79% (68382/86559), 128.39 MiB | 31.89 MiB/s Receiving objects: 80% (69248/86559), 128.39 MiB | 31.89 MiB/s Receiving objects: 81% (70113/86559), 128.39 MiB | 31.89 MiB/s Receiving objects: 82% (70979/86559), 128.39 MiB | 31.89 MiB/s Receiving objects: 83% (71844/86559), 128.39 MiB | 31.89 MiB/s Receiving objects: 84% (72710/86559), 128.39 MiB | 31.89 MiB/s Receiving objects: 85% (73576/86559), 128.39 MiB | 31.89 MiB/s Receiving objects: 86% (74441/86559), 144.88 MiB | 31.99 MiB/s Receiving objects: 87% (75307/86559), 144.88 MiB | 31.99 MiB/s Receiving objects: 88% (76172/86559), 144.88 MiB | 31.99 MiB/s Receiving objects: 89% (77038/86559), 144.88 MiB | 31.99 MiB/s Receiving objects: 90% (77904/86559), 144.88 MiB | 31.99 MiB/s Receiving objects: 91% (78769/86559), 144.88 MiB | 31.99 MiB/s Receiving objects: 92% (79635/86559), 144.88 MiB | 31.99 MiB/s Receiving objects: 93% (80500/86559), 144.88 MiB | 31.99 MiB/s Receiving objects: 94% (81366/86559), 144.88 MiB | 31.99 MiB/s Receiving objects: 95% (82232/86559), 144.88 MiB | 31.99 MiB/s Receiving objects: 96% (83097/86559), 144.88 MiB | 31.99 MiB/s Receiving objects: 97% (83963/86559), 144.88 MiB | 31.99 MiB/s Receiving objects: 98% (84828/86559), 144.88 MiB | 31.99 MiB/s Receiving objects: 99% (85694/86559), 144.88 MiB | 31.99 MiB/s remote: Total 86559 (delta 7875), reused 7187 (delta 7014), pack-reused 77432 (from 3) Receiving objects: 100% (86559/86559), 144.88 MiB | 31.99 MiB/s Receiving objects: 100% (86559/86559), 157.09 MiB | 32.15 MiB/s, done. Resolving deltas: 0% (0/58770) Resolving deltas: 1% (589/58770) Resolving deltas: 2% (1176/58770) Resolving deltas: 3% (1764/58770) Resolving deltas: 4% (2356/58770) Resolving deltas: 5% (2939/58770) Resolving deltas: 6% (3527/58770) Resolving deltas: 7% (4114/58770) Resolving deltas: 8% (4702/58770) Resolving deltas: 9% (5290/58770) Resolving deltas: 10% (5878/58770) Resolving deltas: 11% (6465/58770) Resolving deltas: 12% (7053/58770) Resolving deltas: 13% (7641/58770) Resolving deltas: 14% (8228/58770) Resolving deltas: 15% (8817/58770) Resolving deltas: 16% (9404/58770) Resolving deltas: 17% (9991/58770) Resolving deltas: 18% (10579/58770) Resolving deltas: 19% (11167/58770) Resolving deltas: 20% (11754/58770) Resolving deltas: 21% (12342/58770) Resolving deltas: 22% (12931/58770) Resolving deltas: 23% (13518/58770) Resolving deltas: 24% (14105/58770) Resolving deltas: 25% (14695/58770) Resolving deltas: 26% (15281/58770) Resolving deltas: 27% (15868/58770) Resolving deltas: 28% (16456/58770) Resolving deltas: 29% (17044/58770) Resolving deltas: 30% (17632/58770) Resolving deltas: 31% (18219/58770) Resolving deltas: 32% (18807/58770) Resolving deltas: 33% (19395/58770) Resolving deltas: 34% (19982/58770) Resolving deltas: 35% (20570/58770) Resolving deltas: 36% (21158/58770) Resolving deltas: 37% (21745/58770) Resolving deltas: 38% (22333/58770) Resolving deltas: 39% (22921/58770) Resolving deltas: 40% (23508/58770) Resolving deltas: 41% (24096/58770) Resolving deltas: 42% (24685/58770) Resolving deltas: 43% (25272/58770) Resolving deltas: 44% (25861/58770) Resolving deltas: 45% (26447/58770) Resolving deltas: 46% (27035/58770) Resolving deltas: 47% (27622/58770) Resolving deltas: 48% (28212/58770) Resolving deltas: 49% (28798/58770) Resolving deltas: 50% (29385/58770) Resolving deltas: 51% (29973/58770) Resolving deltas: 52% (30561/58770) Resolving deltas: 53% (31149/58770) Resolving deltas: 54% (31736/58770) Resolving deltas: 55% (32324/58770) Resolving deltas: 56% (32912/58770) Resolving deltas: 57% (33499/58770) Resolving deltas: 58% (34087/58770) Resolving deltas: 59% (34675/58770) Resolving deltas: 60% (35263/58770) Resolving deltas: 61% (35850/58770) Resolving deltas: 62% (36438/58770) Resolving deltas: 63% (37026/58770) Resolving deltas: 64% (37613/58770) Resolving deltas: 65% (38201/58770) Resolving deltas: 66% (38789/58770) Resolving deltas: 67% (39376/58770) Resolving deltas: 68% (39967/58770) Resolving deltas: 69% (40552/58770) Resolving deltas: 70% (41139/58770) Resolving deltas: 71% (41727/58770) Resolving deltas: 72% (42315/58770) Resolving deltas: 73% (42903/58770) Resolving deltas: 74% (43493/58770) Resolving deltas: 75% (44078/58770) Resolving deltas: 76% (44668/58770) Resolving deltas: 77% (45253/58770) Resolving deltas: 78% (45841/58770) Resolving deltas: 79% (46429/58770) Resolving deltas: 80% (47016/58770) Resolving deltas: 81% (47604/58770) Resolving deltas: 82% (48192/58770) Resolving deltas: 83% (48780/58770) Resolving deltas: 84% (49367/58770) Resolving deltas: 85% (49955/58770) Resolving deltas: 86% (50543/58770) Resolving deltas: 87% (51130/58770) Resolving deltas: 88% (51718/58770) Resolving deltas: 89% (52306/58770) Resolving deltas: 90% (52893/58770) Resolving deltas: 91% (53481/58770) Resolving deltas: 92% (54070/58770) Resolving deltas: 93% (54657/58770) Resolving deltas: 94% (55244/58770) Resolving deltas: 95% (55833/58770) Resolving deltas: 96% (56423/58770) Resolving deltas: 97% (57007/58770) Resolving deltas: 98% (57595/58770) Resolving deltas: 99% (58183/58770) Resolving deltas: 100% (58770/58770) Resolving deltas: 100% (58770/58770), done. Fetching commit ea6c04a7fc292ced62d6e0f7001835e66aaaa855 for advanced_sampling ... $ /nix/store/bcnisk3ydfgv26v2gw3zlky24g00yww2-git-2.54.0/bin/git fetch origin ea6c04a7fc292ced62d6e0f7001835e66aaaa855 From https://github.com/alphal00p/gammaloop * branch ea6c04a7fc292ced62d6e0f7001835e66aaaa855 -> FETCH_HEAD $ /nix/store/9ypz3flqsrl5xl495mm8h645gadjsxi1-coreutils-9.11/bin/timeout --kill-after=15s 7200s /nix/store/bcnisk3ydfgv26v2gw3zlky24g00yww2-git-2.54.0/bin/git -c advice.detachedHead=false checkout ea6c04a7fc292ced62d6e0f7001835e66aaaa855 HEAD is now at ea6c04a7f share prepared cut kinematics with conditional sampling $ /nix/store/9ypz3flqsrl5xl495mm8h645gadjsxi1-coreutils-9.11/bin/timeout --kill-after=15s 7200s /nix/store/23zk8sgzamrbmj1fday15szf7f2279s8-nix-2.34.7/bin/nix --extra-experimental-features nix-command --extra-experimental-features flakes --log-format internal-json run .#packages.x86_64-linux.nix-ci-check-gammaloop-nextest-python-api --print-build-logs  Downloading cached nix-ci-check-gammaloop-nextest-python-api from https://cache.nix-ci.com Downloaded cached nix-ci-check-gammaloop-nextest-python-api (1104 B) in 38ms Progress: 0 of 1 built, 1 of 1 downloaded from cache evaluating derivation 'g copying '/nix/store/rn48 evaluating derivation 'g     copying '/nix/store/rn48 evaluating derivation 'g copying '/nix/store/rn48 evaluating derivation 'g copying '/nix/store/rn48 evaluating derivation 'g copying '/nix/store/rn48 evaluating derivation 'g copying '/nix/store/rn48 evaluating derivation 'g copying '/nix/store/rn48 evaluating derivation 'g copying '/nix/store/rn48 evaluating derivation 'g querying gammaloop-nexte querying info about miss querying gammaloop-nexte [0/1 built, 0.0 KiB DL]  [1/0/1 built, 0.0 KiB DL gammaloop-nextest-python-api>  Extracting 1 binary, 1 build script output directory, and 3 linked paths to /build/nextest-archive-kewN1N gammaloop-nextest-python-api>  Extracted 18 files to /build/nextest-archive-kewN1N in 0.06s gammaloop-nextest-python-api> ------------ gammaloop-nextest-python-api>  Nextest run ID d4d42133-248e-43d8-90be-b575313096ad with nextest profile: ci_gammaloop gammaloop-nextest-python-api>  Starting 5 tests across 1 binary gammaloop-nextest-python-api>  FAIL [ 0.517s] (3/5) gammaloop-integration-tests::test_python_api python_evaluate_sample_honors_generate_events_and_observable_snapshots gammaloop-nextest-python-api>   stdout --- gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  running 1 test gammaloop-nextest-python-api>  test python_evaluate_sample_honors_generate_events_and_observable_snapshots ... FAILED gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  failures: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  failures: gammaloop-nextest-python-api>  python_evaluate_sample_honors_generate_events_and_observable_snapshots gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 4 filtered out; finished in 0.51s gammaloop-nextest-python-api>   gammaloop-nextest-python-api>   stderr --- gammaloop-nextest-python-api>  Error: Python API test subprocess failed. gammaloop-nextest-python-api>  stdout: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  stderr: gammaloop-nextest-python-api>  [2026-09-14 01:49:35.908] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.908] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: gammaloop-nextest-python-api>  lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: gammaloop-nextest-python-api>  V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: gammaloop-nextest-python-api>  GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' gammaloop-nextest-python-api>  [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams gammaloop-nextest-python-api>  [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:36.037] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.037] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.037] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.037] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.038] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:49:36.340] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 106.11 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 39ms (48%) │ 20ms (24%) │ 22ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 56ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 95ms (36%) │ 77ms (30%) │ 89ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:49:36.341] @gammaloop_api::se... INFO : Running command set process string ' gammaloop-nextest-python-api>  [quantities.leading_jet_pt] gammaloop-nextest-python-api>  type = "jet" gammaloop-nextest-python-api>  quantity = "PT" gammaloop-nextest-python-api>  dR = 0.4 gammaloop-nextest-python-api>  [...] gammaloop-nextest-python-api>  [2026-09-14 01:49:36.342] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=false gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::evaluate_sample gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: ::__pymethod_evaluate_sample__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  28: _start gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. gammaloop-nextest-python-api>  Run with RUST_BACKTRACE=full to include source snippets. gammaloop-nextest-python-api>  Traceback (most recent call last): gammaloop-nextest-python-api>  File "", line 78, in  gammaloop-nextest-python-api>  without_events = summarize_result(api.evaluate_sample(point)) gammaloop-nextest-python-api>  ~~~~~~~~~~~~~~~~~~~^^^^^^^ gammaloop-nextest-python-api>  pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Location: gammaloop-nextest-python-api>  tests/tests/test_python_api.rs:156:20 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  FAIL [ 0.522s] (4/5) gammaloop-integration-tests::test_python_api python_evaluate_sample_preserves_graph_grouping_and_incoming_pdgs gammaloop-nextest-python-api>   stdout --- gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  running 1 test gammaloop-nextest-python-api>  test python_evaluate_sample_preserves_graph_grouping_and_incoming_pdgs ... FAILED gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  failures: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  failures: gammaloop-nextest-python-api>  python_evaluate_sample_preserves_graph_grouping_and_incoming_pdgs gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 4 filtered out; finished in 0.52s gammaloop-nextest-python-api>   gammaloop-nextest-python-api>   stderr --- gammaloop-nextest-python-api>  Error: Python API test subprocess failed. gammaloop-nextest-python-api>  stdout: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  stderr: gammaloop-nextest-python-api>  [2026-09-14 01:49:35.909] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.909] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: gammaloop-nextest-python-api>  lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: gammaloop-nextest-python-api>  V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: gammaloop-nextest-python-api>  GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' gammaloop-nextest-python-api>  [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams gammaloop-nextest-python-api>  [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:49:35.941] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:36.043] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.043] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.043] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.043] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.044] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:49:36.347] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 105.85 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 36ms (46%) │ 19ms (25%) │ 22ms (29%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 55ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 91ms (35%) │ 77ms (30%) │ 89ms (35%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:49:36.348] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true general.store_additional_weights_in_event=true gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::evaluate_sample gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: ::__pymethod_evaluate_sample__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  28: _start gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. gammaloop-nextest-python-api>  Run with RUST_BACKTRACE=full to include source snippets. gammaloop-nextest-python-api>  Traceback (most recent call last): gammaloop-nextest-python-api>  File "", line 78, in  gammaloop-nextest-python-api>  result = api.evaluate_sample(point) gammaloop-nextest-python-api>  pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Location: gammaloop-nextest-python-api>  tests/tests/test_python_api.rs:156:20 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  FAIL [ 0.585s] (5/5) gammaloop-integration-tests::test_python_api python_evaluate_samples_batch_and_momentum_space_have_expected_shape gammaloop-nextest-python-api>   stdout --- gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  running 1 test gammaloop-nextest-python-api>  test python_evaluate_samples_batch_and_momentum_space_have_expected_shape ... FAILED gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  failures: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  failures: gammaloop-nextest-python-api>  python_evaluate_samples_batch_and_momentum_space_have_expected_shape gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 4 filtered out; finished in 0.58s gammaloop-nextest-python-api>   gammaloop-nextest-python-api>   stderr --- gammaloop-nextest-python-api>  Error: Python API test subprocess failed. gammaloop-nextest-python-api>  stdout: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  stderr: gammaloop-nextest-python-api>  [2026-09-14 01:49:35.908] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.908] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: gammaloop-nextest-python-api>  lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: gammaloop-nextest-python-api>  V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: gammaloop-nextest-python-api>  GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' gammaloop-nextest-python-api>  [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams gammaloop-nextest-python-api>  [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:36.041] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.041] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.042] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.042] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.043] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:49:36.345] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 106.07 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 35ms (45%) │ 20ms (26%) │ 22ms (29%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 55ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 90ms (35%) │ 77ms (30%) │ 89ms (35%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:49:36.346] @gammaloop_api::se... INFO : Running command set process string ' gammaloop-nextest-python-api>  [quantities.leading_jet_pt] gammaloop-nextest-python-api>  type = "jet" gammaloop-nextest-python-api>  quantity = "PT" gammaloop-nextest-python-api>  dR = 0.4 gammaloop-nextest-python-api>  [...] gammaloop-nextest-python-api>  [2026-09-14 01:49:36.347] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::evaluate_samples gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: ::__pymethod_evaluate_samples__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  28: _start gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. gammaloop-nextest-python-api>  Run with RUST_BACKTRACE=full to include source snippets. gammaloop-nextest-python-api>  Traceback (most recent call last): gammaloop-nextest-python-api>  File "", line 85, in  gammaloop-nextest-python-api>  batch = summarize_batch_result(api.evaluate_samples(points)) gammaloop-nextest-python-api>  ~~~~~~~~~~~~~~~~~~~~^^^^^^^^ gammaloop-nextest-python-api>  pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Location: gammaloop-nextest-python-api>  tests/tests/test_python_api.rs:156:20 gammaloop-nextest-python-api>  gammaloop-nextest-python-api> ------------ gammaloop-nextest-python-api>  Summary [ 0.586s] 5 tests run: 2 passed, 3 failed, 0 skipped gammaloop-nextest-python-api>  FAIL [ 0.517s] (3/5) gammaloop-integration-tests::test_python_api python_evaluate_sample_honors_generate_events_and_observable_snapshots gammaloop-nextest-python-api>   stdout --- gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  running 1 test gammaloop-nextest-python-api>  test python_evaluate_sample_honors_generate_events_and_observable_snapshots ... FAILED gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  failures: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  failures: gammaloop-nextest-python-api>  python_evaluate_sample_honors_generate_events_and_observable_snapshots gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 4 filtered out; finished in 0.51s gammaloop-nextest-python-api>   gammaloop-nextest-python-api>   stderr --- gammaloop-nextest-python-api>  Error: Python API test subprocess failed. gammaloop-nextest-python-api>  stdout: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  stderr: gammaloop-nextest-python-api>  [2026-09-14 01:49:35.908] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.908] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: gammaloop-nextest-python-api>  lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: gammaloop-nextest-python-api>  V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: gammaloop-nextest-python-api>  GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' gammaloop-nextest-python-api>  [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams gammaloop-nextest-python-api>  [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:36.037] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.037] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.037] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.037] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.038] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:49:36.340] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 106.11 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 39ms (48%) │ 20ms (24%) │ 22ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 56ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 95ms (36%) │ 77ms (30%) │ 89ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:49:36.341] @gammaloop_api::se... INFO : Running command set process string ' gammaloop-nextest-python-api>  [quantities.leading_jet_pt] gammaloop-nextest-python-api>  type = "jet" gammaloop-nextest-python-api>  quantity = "PT" gammaloop-nextest-python-api>  dR = 0.4 gammaloop-nextest-python-api>  [...] gammaloop-nextest-python-api>  [2026-09-14 01:49:36.342] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=false gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::evaluate_sample gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: ::__pymethod_evaluate_sample__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  28: _start gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. gammaloop-nextest-python-api>  Run with RUST_BACKTRACE=full to include source snippets. gammaloop-nextest-python-api>  Traceback (most recent call last): gammaloop-nextest-python-api>  File "", line 78, in  gammaloop-nextest-python-api>  without_events = summarize_result(api.evaluate_sample(point)) gammaloop-nextest-python-api>  ~~~~~~~~~~~~~~~~~~~^^^^^^^ gammaloop-nextest-python-api>  pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Location: gammaloop-nextest-python-api>  tests/tests/test_python_api.rs:156:20 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  FAIL [ 0.522s] (4/5) gammaloop-integration-tests::test_python_api python_evaluate_sample_preserves_graph_grouping_and_incoming_pdgs gammaloop-nextest-python-api>   stdout --- gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  running 1 test gammaloop-nextest-python-api>  test python_evaluate_sample_preserves_graph_grouping_and_incoming_pdgs ... FAILED gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  failures: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  failures: gammaloop-nextest-python-api>  python_evaluate_sample_preserves_graph_grouping_and_incoming_pdgs gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 4 filtered out; finished in 0.52s gammaloop-nextest-python-api>   gammaloop-nextest-python-api>   stderr --- gammaloop-nextest-python-api>  Error: Python API test subprocess failed. gammaloop-nextest-python-api>  stdout: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  stderr: gammaloop-nextest-python-api>  [2026-09-14 01:49:35.909] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.909] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: gammaloop-nextest-python-api>  lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: gammaloop-nextest-python-api>  V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: gammaloop-nextest-python-api>  GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' gammaloop-nextest-python-api>  [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams gammaloop-nextest-python-api>  [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:49:35.941] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:36.043] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.043] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.043] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.043] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.044] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:49:36.347] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 105.85 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 36ms (46%) │ 19ms (25%) │ 22ms (29%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 55ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 91ms (35%) │ 77ms (30%) │ 89ms (35%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:49:36.348] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true general.store_additional_weights_in_event=true gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::evaluate_sample gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: ::__pymethod_evaluate_sample__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  28: _start gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. gammaloop-nextest-python-api>  Run with RUST_BACKTRACE=full to include source snippets. gammaloop-nextest-python-api>  Traceback (most recent call last): gammaloop-nextest-python-api>  File "", line 78, in  gammaloop-nextest-python-api>  result = api.evaluate_sample(point) gammaloop-nextest-python-api>  pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Location: gammaloop-nextest-python-api>  tests/tests/test_python_api.rs:156:20 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  FAIL [ 0.585s] (5/5) gammaloop-integration-tests::test_python_api python_evaluate_samples_batch_and_momentum_space_have_expected_shape gammaloop-nextest-python-api>   stdout --- gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  running 1 test gammaloop-nextest-python-api>  test python_evaluate_samples_batch_and_momentum_space_have_expected_shape ... FAILED gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  failures: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  failures: gammaloop-nextest-python-api>  python_evaluate_samples_batch_and_momentum_space_have_expected_shape gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 4 filtered out; finished in 0.58s gammaloop-nextest-python-api>   gammaloop-nextest-python-api>   stderr --- gammaloop-nextest-python-api>  Error: Python API test subprocess failed. gammaloop-nextest-python-api>  stdout: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  stderr: gammaloop-nextest-python-api>  [2026-09-14 01:49:35.908] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.908] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: gammaloop-nextest-python-api>  lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: gammaloop-nextest-python-api>  V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: gammaloop-nextest-python-api>  GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' gammaloop-nextest-python-api>  [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams gammaloop-nextest-python-api>  [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:36.041] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.041] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.042] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.042] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.043] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:49:36.345] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 106.07 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 35ms (45%) │ 20ms (26%) │ 22ms (29%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 55ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 90ms (35%) │ 77ms (30%) │ 89ms (35%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:49:36.346] @gammaloop_api::se... INFO : Running command set process string ' gammaloop-nextest-python-api>  [quantities.leading_jet_pt] gammaloop-nextest-python-api>  type = "jet" gammaloop-nextest-python-api>  quantity = "PT" gammaloop-nextest-python-api>  dR = 0.4 gammaloop-nextest-python-api>  [...] gammaloop-nextest-python-api>  [2026-09-14 01:49:36.347] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::evaluate_samples gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: ::__pymethod_evaluate_samples__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  28: _start gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. gammaloop-nextest-python-api>  Run with RUST_BACKTRACE=full to include source snippets. gammaloop-nextest-python-api>  Traceback (most recent call last): gammaloop-nextest-python-api>  File "", line 85, in  gammaloop-nextest-python-api>  batch = summarize_batch_result(api.evaluate_samples(points)) gammaloop-nextest-python-api>  ~~~~~~~~~~~~~~~~~~~~^^^^^^^^ gammaloop-nextest-python-api>  pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Location: gammaloop-nextest-python-api>  tests/tests/test_python_api.rs:156:20 gammaloop-nextest-python-api>  gammaloop-nextest-python-api> error: test run failed gammaloop-nextest-python-api>  gammaloop-nextest-python-api> ========== nextest test summary ========== gammaloop-nextest-python-api> report: target/nextest/ci_gammaloop/junit.xml gammaloop-nextest-python-api> tests: 5, failures: 3, errors: 0 gammaloop-nextest-python-api>  gammaloop-nextest-python-api> 1. gammaloop-integration-tests::test_python_api::python_evaluate_sample_honors_generate_events_and_observable_snapshots gammaloop-nextest-python-api>  failure: test failure with exit code 101 gammaloop-nextest-python-api>  Error: Python API test subprocess failed. gammaloop-nextest-python-api>  stdout: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  stderr: gammaloop-nextest-python-api>  [2026-09-14 01:49:35.908] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.908] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: gammaloop-nextest-python-api>  lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: gammaloop-nextest-python-api>  V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: gammaloop-nextest-python-api>  GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' gammaloop-nextest-python-api>  [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams gammaloop-nextest-python-api>  [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:36.037] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.037] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.037] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.037] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.038] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:49:36.340] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 106.11 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 39ms (48%) │ 20ms (24%) │ 22ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 56ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 95ms (36%) │ 77ms (30%) │ 89ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:49:36.341] @gammaloop_api::se... INFO : Running command set process string ' gammaloop-nextest-python-api>  [quantities.leading_jet_pt] gammaloop-nextest-python-api>  type = "jet" gammaloop-nextest-python-api>  quantity = "PT" gammaloop-nextest-python-api>  dR = 0.4 gammaloop-nextest-python-api>  [...] gammaloop-nextest-python-api>  [2026-09-14 01:49:36.342] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=false gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::evaluate_sample gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: ::__pymethod_evaluate_sample__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  28: _start gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. gammaloop-nextest-python-api>  Run with RUST_BACKTRACE=full to include source snippets. gammaloop-nextest-python-api>  Traceback (most recent call last): gammaloop-nextest-python-api>  File "", line 78, in  gammaloop-nextest-python-api>  without_events = summarize_result(api.evaluate_sample(point)) gammaloop-nextest-python-api>  ~~~~~~~~~~~~~~~~~~~^^^^^^^ gammaloop-nextest-python-api>  pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ... omitted 2 more lines; see full nextest output above gammaloop-nextest-python-api>  system-out gammaloop-nextest-python-api>  running 1 test gammaloop-nextest-python-api>  test python_evaluate_sample_honors_generate_events_and_observable_snapshots ... FAILED gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  failures: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  failures: gammaloop-nextest-python-api>  python_evaluate_sample_honors_generate_events_and_observable_snapshots gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 4 filtered out; finished in 0.51s gammaloop-nextest-python-api>  system-err gammaloop-nextest-python-api>  Error: Python API test subprocess failed. gammaloop-nextest-python-api>  stdout: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  stderr: gammaloop-nextest-python-api>  [2026-09-14 01:49:35.908] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.908] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: gammaloop-nextest-python-api>  lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: gammaloop-nextest-python-api>  V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: gammaloop-nextest-python-api>  GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' gammaloop-nextest-python-api>  [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams gammaloop-nextest-python-api>  [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:36.037] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.037] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.037] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.037] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.038] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:49:36.340] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 106.11 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 39ms (48%) │ 20ms (24%) │ 22ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 56ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 95ms (36%) │ 77ms (30%) │ 89ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:49:36.341] @gammaloop_api::se... INFO : Running command set process string ' gammaloop-nextest-python-api>  [quantities.leading_jet_pt] gammaloop-nextest-python-api>  type = "jet" gammaloop-nextest-python-api>  quantity = "PT" gammaloop-nextest-python-api>  dR = 0.4 gammaloop-nextest-python-api>  [...] gammaloop-nextest-python-api>  [2026-09-14 01:49:36.342] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=false gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::evaluate_sample gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: ::__pymethod_evaluate_sample__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  28: _start gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. gammaloop-nextest-python-api>  Run with RUST_BACKTRACE=full to include source snippets. gammaloop-nextest-python-api>  Traceback (most recent call last): gammaloop-nextest-python-api>  File "", line 78, in  gammaloop-nextest-python-api>  without_events = summarize_result(api.evaluate_sample(point)) gammaloop-nextest-python-api>  ~~~~~~~~~~~~~~~~~~~^^^^^^^ gammaloop-nextest-python-api>  pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ... omitted 2 more lines; see full nextest output above gammaloop-nextest-python-api>  gammaloop-nextest-python-api> 2. gammaloop-integration-tests::test_python_api::python_evaluate_sample_preserves_graph_grouping_and_incoming_pdgs gammaloop-nextest-python-api>  failure: test failure with exit code 101 gammaloop-nextest-python-api>  Error: Python API test subprocess failed. gammaloop-nextest-python-api>  stdout: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  stderr: gammaloop-nextest-python-api>  [2026-09-14 01:49:35.909] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.909] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: gammaloop-nextest-python-api>  lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: gammaloop-nextest-python-api>  V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: gammaloop-nextest-python-api>  GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' gammaloop-nextest-python-api>  [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams gammaloop-nextest-python-api>  [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:49:35.941] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:36.043] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.043] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.043] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.043] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.044] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:49:36.347] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 105.85 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 36ms (46%) │ 19ms (25%) │ 22ms (29%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 55ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 91ms (35%) │ 77ms (30%) │ 89ms (35%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:49:36.348] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true general.store_additional_weights_in_event=true gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::evaluate_sample gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: ::__pymethod_evaluate_sample__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  28: _start gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. gammaloop-nextest-python-api>  Run with RUST_BACKTRACE=full to include source snippets. gammaloop-nextest-python-api>  Traceback (most recent call last): gammaloop-nextest-python-api>  File "", line 78, in  gammaloop-nextest-python-api>  result = api.evaluate_sample(point) gammaloop-nextest-python-api>  pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Location: gammaloop-nextest-python-api>  tests/tests/test_python_api.rs:156:20 gammaloop-nextest-python-api>  system-out gammaloop-nextest-python-api>  running 1 test gammaloop-nextest-python-api>  test python_evaluate_sample_preserves_graph_grouping_and_incoming_pdgs ... FAILED gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  failures: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  failures: gammaloop-nextest-python-api>  python_evaluate_sample_preserves_graph_grouping_and_incoming_pdgs gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 4 filtered out; finished in 0.52s gammaloop-nextest-python-api>  system-err gammaloop-nextest-python-api>  Error: Python API test subprocess failed. gammaloop-nextest-python-api>  stdout: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  stderr: gammaloop-nextest-python-api>  [2026-09-14 01:49:35.909] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.909] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: gammaloop-nextest-python-api>  lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: gammaloop-nextest-python-api>  V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: gammaloop-nextest-python-api>  GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' gammaloop-nextest-python-api>  [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams gammaloop-nextest-python-api>  [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:49:35.941] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:36.043] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.043] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.043] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.043] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.044] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:49:36.347] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 105.85 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 36ms (46%) │ 19ms (25%) │ 22ms (29%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 55ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 91ms (35%) │ 77ms (30%) │ 89ms (35%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:49:36.348] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true general.store_additional_weights_in_event=true gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::evaluate_sample gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: ::__pymethod_evaluate_sample__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  28: _start gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. gammaloop-nextest-python-api>  Run with RUST_BACKTRACE=full to include source snippets. gammaloop-nextest-python-api>  Traceback (most recent call last): gammaloop-nextest-python-api>  File "", line 78, in  gammaloop-nextest-python-api>  result = api.evaluate_sample(point) gammaloop-nextest-python-api>  pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Location: gammaloop-nextest-python-api>  tests/tests/test_python_api.rs:156:20 gammaloop-nextest-python-api>  gammaloop-nextest-python-api> 3. gammaloop-integration-tests::test_python_api::python_evaluate_samples_batch_and_momentum_space_have_expected_shape gammaloop-nextest-python-api>  failure: test failure with exit code 101 gammaloop-nextest-python-api>  Error: Python API test subprocess failed. gammaloop-nextest-python-api>  stdout: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  stderr: gammaloop-nextest-python-api>  [2026-09-14 01:49:35.908] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.908] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: gammaloop-nextest-python-api>  lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: gammaloop-nextest-python-api>  V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: gammaloop-nextest-python-api>  GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' gammaloop-nextest-python-api>  [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams gammaloop-nextest-python-api>  [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:36.041] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.041] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.042] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.042] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.043] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:49:36.345] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 106.07 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 35ms (45%) │ 20ms (26%) │ 22ms (29%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 55ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 90ms (35%) │ 77ms (30%) │ 89ms (35%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:49:36.346] @gammaloop_api::se... INFO : Running command set process string ' gammaloop-nextest-python-api>  [quantities.leading_jet_pt] gammaloop-nextest-python-api>  type = "jet" gammaloop-nextest-python-api>  quantity = "PT" gammaloop-nextest-python-api>  dR = 0.4 gammaloop-nextest-python-api>  [...] gammaloop-nextest-python-api>  [2026-09-14 01:49:36.347] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::evaluate_samples gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: ::__pymethod_evaluate_samples__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  28: _start gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. gammaloop-nextest-python-api>  Run with RUST_BACKTRACE=full to include source snippets. gammaloop-nextest-python-api>  Traceback (most recent call last): gammaloop-nextest-python-api>  File "", line 85, in  gammaloop-nextest-python-api>  batch = summarize_batch_result(api.evaluate_samples(points)) gammaloop-nextest-python-api>  ~~~~~~~~~~~~~~~~~~~~^^^^^^^^ gammaloop-nextest-python-api>  pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ... omitted 2 more lines; see full nextest output above gammaloop-nextest-python-api>  system-out gammaloop-nextest-python-api>  running 1 test gammaloop-nextest-python-api>  test python_evaluate_samples_batch_and_momentum_space_have_expected_shape ... FAILED gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  failures: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  failures: gammaloop-nextest-python-api>  python_evaluate_samples_batch_and_momentum_space_have_expected_shape gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 4 filtered out; finished in 0.58s gammaloop-nextest-python-api>  system-err gammaloop-nextest-python-api>  Error: Python API test subprocess failed. gammaloop-nextest-python-api>  stdout: gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  stderr: gammaloop-nextest-python-api>  [2026-09-14 01:49:35.908] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.908] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: gammaloop-nextest-python-api>  lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: gammaloop-nextest-python-api>  V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) gammaloop-nextest-python-api>  [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: gammaloop-nextest-python-api>  GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' gammaloop-nextest-python-api>  [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams gammaloop-nextest-python-api>  [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 gammaloop-nextest-python-api>  [2026-09-14 01:49:36.041] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.041] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:49:36.042] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.042] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. gammaloop-nextest-python-api>  [2026-09-14 01:49:36.043] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:49:36.345] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 106.07 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 35ms (45%) │ 20ms (26%) │ 22ms (29%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 55ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 90ms (35%) │ 77ms (30%) │ 89ms (35%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:49:36.346] @gammaloop_api::se... INFO : Running command set process string ' gammaloop-nextest-python-api>  [quantities.leading_jet_pt] gammaloop-nextest-python-api>  type = "jet" gammaloop-nextest-python-api>  quantity = "PT" gammaloop-nextest-python-api>  dR = 0.4 gammaloop-nextest-python-api>  [...] gammaloop-nextest-python-api>  [2026-09-14 01:49:36.347] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::evaluate_samples gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: ::__pymethod_evaluate_samples__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  28: _start gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. gammaloop-nextest-python-api>  Run with RUST_BACKTRACE=full to include source snippets. gammaloop-nextest-python-api>  Traceback (most recent call last): gammaloop-nextest-python-api>  File "", line 85, in  gammaloop-nextest-python-api>  batch = summarize_batch_result(api.evaluate_samples(points)) gammaloop-nextest-python-api>  ~~~~~~~~~~~~~~~~~~~~^^^^^^^^ gammaloop-nextest-python-api>  pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ... omitted 2 more lines; see full nextest output above gammaloop-nextest-python-api> ========================================= error: Cannot build '/nix/store/01gn8dzfy70val75zfjka0c53k7ic6ry-gammaloop-nextest-python-api.drv'. Reason: builder failed with exit code 100. Output paths: /nix/store/bdfhp5r6ifvar9wf0kcdqhc2cmivf290-gammaloop-nextest-python-api Last 1565 log lines: >  Extracting 1 binary, 1 build script output directory, and 3 linked paths to /build/nextest-archive-kewN1N >  Extracted 18 files to /build/nextest-archive-kewN1N in 0.06s > ------------ >  Nextest run ID d4d42133-248e-43d8-90be-b575313096ad with nextest profile: ci_gammaloop >  Starting 5 tests across 1 binary >  FAIL [ 0.517s] (3/5) gammaloop-integration-tests::test_python_api python_evaluate_sample_honors_generate_events_and_observable_snapshots >   stdout --- > > running 1 test > test python_evaluate_sample_honors_generate_events_and_observable_snapshots ... FAILED > > failures: > > failures: > python_evaluate_sample_honors_generate_events_and_observable_snapshots > > test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 4 filtered out; finished in 0.51s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 01:49:35.908] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:49:35.908] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: > lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: > V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: > GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 > [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' > [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams > [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:49:36.037] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) > [2026-09-14 01:49:36.037] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:49:36.037] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:49:36.037] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:49:36.038] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:49:36.340] @commands::generate INFO : > Integrand generation summary > peak RAM 106.11 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 39ms (48%) │ 20ms (24%) │ 22ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 56ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 95ms (36%) │ 77ms (30%) │ 89ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:49:36.341] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 01:49:36.342] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=false > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: > at : > 13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 14: ::evaluate_samples_raw > at : > 15: ::run > at : > 16: ::evaluate_sample > at : > 17: ::__pymethod_evaluate_sample__ > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 20: method_vectorcall_VARARGS_KEYWORDS > at : > 21: _PyEval_EvalFrameDefault.localalias > at : > 22: PyEval_EvalCode.localalias > at : > 23: run_eval_code_obj > at : > 24: run_mod > at : > 25: Py_RunMain.localalias > at : > 26: __libc_start_call_main > at : > 27: __libc_start_main_alias_2 > at : > 28: _start > at : > > Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. > Run with RUST_BACKTRACE=full to include source snippets. > Traceback (most recent call last): > File "", line 78, in > without_events = summarize_result(api.evaluate_sample(point)) > ~~~~~~~~~~~~~~~~~~~^^^^^^^ > pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 > > > Location: > tests/tests/test_python_api.rs:156:20 > >  FAIL [ 0.522s] (4/5) gammaloop-integration-tests::test_python_api python_evaluate_sample_preserves_graph_grouping_and_incoming_pdgs >   stdout --- > > running 1 test > test python_evaluate_sample_preserves_graph_grouping_and_incoming_pdgs ... FAILED > > failures: > > failures: > python_evaluate_sample_preserves_graph_grouping_and_incoming_pdgs > > test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 4 filtered out; finished in 0.52s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 01:49:35.909] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:49:35.909] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: > lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: > V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: > GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 > [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' > [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams > [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:49:35.941] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:49:36.043] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) > [2026-09-14 01:49:36.043] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:49:36.043] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:49:36.043] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:49:36.044] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:49:36.347] @commands::generate INFO : > Integrand generation summary > peak RAM 105.85 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 36ms (46%) │ 19ms (25%) │ 22ms (29%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 55ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 91ms (35%) │ 77ms (30%) │ 89ms (35%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:49:36.348] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true general.store_additional_weights_in_event=true > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: > at : > 13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 14: ::evaluate_samples_raw > at : > 15: ::run > at : > 16: ::evaluate_sample > at : > 17: ::__pymethod_evaluate_sample__ > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 20: method_vectorcall_VARARGS_KEYWORDS > at : > 21: _PyEval_EvalFrameDefault.localalias > at : > 22: PyEval_EvalCode.localalias > at : > 23: run_eval_code_obj > at : > 24: run_mod > at : > 25: Py_RunMain.localalias > at : > 26: __libc_start_call_main > at : > 27: __libc_start_main_alias_2 > at : > 28: _start > at : > > Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. > Run with RUST_BACKTRACE=full to include source snippets. > Traceback (most recent call last): > File "", line 78, in > result = api.evaluate_sample(point) > pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 > > > Location: > tests/tests/test_python_api.rs:156:20 > >  FAIL [ 0.585s] (5/5) gammaloop-integration-tests::test_python_api python_evaluate_samples_batch_and_momentum_space_have_expected_shape >   stdout --- > > running 1 test > test python_evaluate_samples_batch_and_momentum_space_have_expected_shape ... FAILED > > failures: > > failures: > python_evaluate_samples_batch_and_momentum_space_have_expected_shape > > test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 4 filtered out; finished in 0.58s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 01:49:35.908] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:49:35.908] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: > lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: > V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: > GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 > [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' > [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams > [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:49:36.041] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) > [2026-09-14 01:49:36.041] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:49:36.042] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:49:36.042] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:49:36.043] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:49:36.345] @commands::generate INFO : > Integrand generation summary > peak RAM 106.07 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 35ms (45%) │ 20ms (26%) │ 22ms (29%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 55ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 90ms (35%) │ 77ms (30%) │ 89ms (35%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:49:36.346] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 01:49:36.347] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: > at : > 13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 14: ::evaluate_samples_raw > at : > 15: ::run > at : > 16: ::evaluate_samples > at : > 17: ::__pymethod_evaluate_samples__ > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 20: method_vectorcall_VARARGS_KEYWORDS > at : > 21: _PyEval_EvalFrameDefault.localalias > at : > 22: PyEval_EvalCode.localalias > at : > 23: run_eval_code_obj > at : > 24: run_mod > at : > 25: Py_RunMain.localalias > at : > 26: __libc_start_call_main > at : > 27: __libc_start_main_alias_2 > at : > 28: _start > at : > > Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. > Run with RUST_BACKTRACE=full to include source snippets. > Traceback (most recent call last): > File "", line 85, in > batch = summarize_batch_result(api.evaluate_samples(points)) > ~~~~~~~~~~~~~~~~~~~~^^^^^^^^ > pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 > > > Location: > tests/tests/test_python_api.rs:156:20 > > ------------ >  Summary [ 0.586s] 5 tests run: 2 passed, 3 failed, 0 skipped >  FAIL [ 0.517s] (3/5) gammaloop-integration-tests::test_python_api python_evaluate_sample_honors_generate_events_and_observable_snapshots >   stdout --- > > running 1 test > test python_evaluate_sample_honors_generate_events_and_observable_snapshots ... FAILED > > failures: > > failures: > python_evaluate_sample_honors_generate_events_and_observable_snapshots > > test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 4 filtered out; finished in 0.51s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 01:49:35.908] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:49:35.908] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: > lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: > V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: > GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 > [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' > [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams > [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:49:36.037] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) > [2026-09-14 01:49:36.037] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:49:36.037] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:49:36.037] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:49:36.038] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:49:36.340] @commands::generate INFO : > Integrand generation summary > peak RAM 106.11 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 39ms (48%) │ 20ms (24%) │ 22ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 56ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 95ms (36%) │ 77ms (30%) │ 89ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:49:36.341] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 01:49:36.342] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=false > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: > at : > 13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 14: ::evaluate_samples_raw > at : > 15: ::run > at : > 16: ::evaluate_sample > at : > 17: ::__pymethod_evaluate_sample__ > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 20: method_vectorcall_VARARGS_KEYWORDS > at : > 21: _PyEval_EvalFrameDefault.localalias > at : > 22: PyEval_EvalCode.localalias > at : > 23: run_eval_code_obj > at : > 24: run_mod > at : > 25: Py_RunMain.localalias > at : > 26: __libc_start_call_main > at : > 27: __libc_start_main_alias_2 > at : > 28: _start > at : > > Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. > Run with RUST_BACKTRACE=full to include source snippets. > Traceback (most recent call last): > File "", line 78, in > without_events = summarize_result(api.evaluate_sample(point)) > ~~~~~~~~~~~~~~~~~~~^^^^^^^ > pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 > > > Location: > tests/tests/test_python_api.rs:156:20 > >  FAIL [ 0.522s] (4/5) gammaloop-integration-tests::test_python_api python_evaluate_sample_preserves_graph_grouping_and_incoming_pdgs >   stdout --- > > running 1 test > test python_evaluate_sample_preserves_graph_grouping_and_incoming_pdgs ... FAILED > > failures: > > failures: > python_evaluate_sample_preserves_graph_grouping_and_incoming_pdgs > > test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 4 filtered out; finished in 0.52s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 01:49:35.909] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:49:35.909] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: > lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: > V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: > GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 > [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' > [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams > [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:49:35.941] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:49:36.043] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) > [2026-09-14 01:49:36.043] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:49:36.043] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:49:36.043] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:49:36.044] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:49:36.347] @commands::generate INFO : > Integrand generation summary > peak RAM 105.85 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 36ms (46%) │ 19ms (25%) │ 22ms (29%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 55ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 91ms (35%) │ 77ms (30%) │ 89ms (35%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:49:36.348] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true general.store_additional_weights_in_event=true > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: > at : > 13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 14: ::evaluate_samples_raw > at : > 15: ::run > at : > 16: ::evaluate_sample > at : > 17: ::__pymethod_evaluate_sample__ > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 20: method_vectorcall_VARARGS_KEYWORDS > at : > 21: _PyEval_EvalFrameDefault.localalias > at : > 22: PyEval_EvalCode.localalias > at : > 23: run_eval_code_obj > at : > 24: run_mod > at : > 25: Py_RunMain.localalias > at : > 26: __libc_start_call_main > at : > 27: __libc_start_main_alias_2 > at : > 28: _start > at : > > Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. > Run with RUST_BACKTRACE=full to include source snippets. > Traceback (most recent call last): > File "", line 78, in > result = api.evaluate_sample(point) > pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 > > > Location: > tests/tests/test_python_api.rs:156:20 > >  FAIL [ 0.585s] (5/5) gammaloop-integration-tests::test_python_api python_evaluate_samples_batch_and_momentum_space_have_expected_shape >   stdout --- > > running 1 test > test python_evaluate_samples_batch_and_momentum_space_have_expected_shape ... FAILED > > failures: > > failures: > python_evaluate_samples_batch_and_momentum_space_have_expected_shape > > test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 4 filtered out; finished in 0.58s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 01:49:35.908] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:49:35.908] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: > lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: > V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: > GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 > [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' > [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams > [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:49:36.041] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) > [2026-09-14 01:49:36.041] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:49:36.042] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:49:36.042] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:49:36.043] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:49:36.345] @commands::generate INFO : > Integrand generation summary > peak RAM 106.07 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 35ms (45%) │ 20ms (26%) │ 22ms (29%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 55ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 90ms (35%) │ 77ms (30%) │ 89ms (35%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:49:36.346] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 01:49:36.347] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: > at : > 13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 14: ::evaluate_samples_raw > at : > 15: ::run > at : > 16: ::evaluate_samples > at : > 17: ::__pymethod_evaluate_samples__ > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 20: method_vectorcall_VARARGS_KEYWORDS > at : > 21: _PyEval_EvalFrameDefault.localalias > at : > 22: PyEval_EvalCode.localalias > at : > 23: run_eval_code_obj > at : > 24: run_mod > at : > 25: Py_RunMain.localalias > at : > 26: __libc_start_call_main > at : > 27: __libc_start_main_alias_2 > at : > 28: _start > at : > > Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. > Run with RUST_BACKTRACE=full to include source snippets. > Traceback (most recent call last): > File "", line 85, in > batch = summarize_batch_result(api.evaluate_samples(points)) > ~~~~~~~~~~~~~~~~~~~~^^^^^^^^ > pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 > > > Location: > tests/tests/test_python_api.rs:156:20 > > error: test run failed > > ========== nextest test summary ========== > report: target/nextest/ci_gammaloop/junit.xml > tests: 5, failures: 3, errors: 0 > > 1. gammaloop-integration-tests::test_python_api::python_evaluate_sample_honors_generate_events_and_observable_snapshots > failure: test failure with exit code 101 > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 01:49:35.908] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:49:35.908] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: > lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: > V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: > GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 > [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' > [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams > [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:49:36.037] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) > [2026-09-14 01:49:36.037] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:49:36.037] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:49:36.037] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:49:36.038] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:49:36.340] @commands::generate INFO : > Integrand generation summary > peak RAM 106.11 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 39ms (48%) │ 20ms (24%) │ 22ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 56ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 95ms (36%) │ 77ms (30%) │ 89ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:49:36.341] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 01:49:36.342] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=false > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: > at : > 13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 14: ::evaluate_samples_raw > at : > 15: ::run > at : > 16: ::evaluate_sample > at : > 17: ::__pymethod_evaluate_sample__ > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 20: method_vectorcall_VARARGS_KEYWORDS > at : > 21: _PyEval_EvalFrameDefault.localalias > at : > 22: PyEval_EvalCode.localalias > at : > 23: run_eval_code_obj > at : > 24: run_mod > at : > 25: Py_RunMain.localalias > at : > 26: __libc_start_call_main > at : > 27: __libc_start_main_alias_2 > at : > 28: _start > at : > > Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. > Run with RUST_BACKTRACE=full to include source snippets. > Traceback (most recent call last): > File "", line 78, in > without_events = summarize_result(api.evaluate_sample(point)) > ~~~~~~~~~~~~~~~~~~~^^^^^^^ > pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 > > > ... omitted 2 more lines; see full nextest output above > system-out > running 1 test > test python_evaluate_sample_honors_generate_events_and_observable_snapshots ... FAILED > > failures: > > failures: > python_evaluate_sample_honors_generate_events_and_observable_snapshots > > test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 4 filtered out; finished in 0.51s > system-err > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 01:49:35.908] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:49:35.908] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: > lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: > V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: > GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 > [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' > [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams > [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:49:36.037] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) > [2026-09-14 01:49:36.037] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:49:36.037] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:49:36.037] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:49:36.038] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:49:36.340] @commands::generate INFO : > Integrand generation summary > peak RAM 106.11 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 39ms (48%) │ 20ms (24%) │ 22ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 56ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 95ms (36%) │ 77ms (30%) │ 89ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:49:36.341] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 01:49:36.342] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=false > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: > at : > 13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 14: ::evaluate_samples_raw > at : > 15: ::run > at : > 16: ::evaluate_sample > at : > 17: ::__pymethod_evaluate_sample__ > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 20: method_vectorcall_VARARGS_KEYWORDS > at : > 21: _PyEval_EvalFrameDefault.localalias > at : > 22: PyEval_EvalCode.localalias > at : > 23: run_eval_code_obj > at : > 24: run_mod > at : > 25: Py_RunMain.localalias > at : > 26: __libc_start_call_main > at : > 27: __libc_start_main_alias_2 > at : > 28: _start > at : > > Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. > Run with RUST_BACKTRACE=full to include source snippets. > Traceback (most recent call last): > File "", line 78, in > without_events = summarize_result(api.evaluate_sample(point)) > ~~~~~~~~~~~~~~~~~~~^^^^^^^ > pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 > > > ... omitted 2 more lines; see full nextest output above > > 2. gammaloop-integration-tests::test_python_api::python_evaluate_sample_preserves_graph_grouping_and_incoming_pdgs > failure: test failure with exit code 101 > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 01:49:35.909] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:49:35.909] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: > lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: > V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: > GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 > [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' > [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams > [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:49:35.941] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:49:36.043] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) > [2026-09-14 01:49:36.043] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:49:36.043] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:49:36.043] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:49:36.044] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:49:36.347] @commands::generate INFO : > Integrand generation summary > peak RAM 105.85 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 36ms (46%) │ 19ms (25%) │ 22ms (29%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 55ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 91ms (35%) │ 77ms (30%) │ 89ms (35%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:49:36.348] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true general.store_additional_weights_in_event=true > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: > at : > 13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 14: ::evaluate_samples_raw > at : > 15: ::run > at : > 16: ::evaluate_sample > at : > 17: ::__pymethod_evaluate_sample__ > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 20: method_vectorcall_VARARGS_KEYWORDS > at : > 21: _PyEval_EvalFrameDefault.localalias > at : > 22: PyEval_EvalCode.localalias > at : > 23: run_eval_code_obj > at : > 24: run_mod > at : > 25: Py_RunMain.localalias > at : > 26: __libc_start_call_main > at : > 27: __libc_start_main_alias_2 > at : > 28: _start > at : > > Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. > Run with RUST_BACKTRACE=full to include source snippets. > Traceback (most recent call last): > File "", line 78, in > result = api.evaluate_sample(point) > pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 > > > Location: > tests/tests/test_python_api.rs:156:20 > system-out > running 1 test > test python_evaluate_sample_preserves_graph_grouping_and_incoming_pdgs ... FAILED > > failures: > > failures: > python_evaluate_sample_preserves_graph_grouping_and_incoming_pdgs > > test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 4 filtered out; finished in 0.52s > system-err > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 01:49:35.909] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:49:35.909] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: > lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: > V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: > GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 > [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' > [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams > [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:49:35.941] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:49:36.043] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) > [2026-09-14 01:49:36.043] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:49:36.043] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:49:36.043] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:49:36.044] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:49:36.347] @commands::generate INFO : > Integrand generation summary > peak RAM 105.85 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 36ms (46%) │ 19ms (25%) │ 22ms (29%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 55ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 91ms (35%) │ 77ms (30%) │ 89ms (35%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:49:36.348] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true general.store_additional_weights_in_event=true > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: > at : > 13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 14: ::evaluate_samples_raw > at : > 15: ::run > at : > 16: ::evaluate_sample > at : > 17: ::__pymethod_evaluate_sample__ > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 20: method_vectorcall_VARARGS_KEYWORDS > at : > 21: _PyEval_EvalFrameDefault.localalias > at : > 22: PyEval_EvalCode.localalias > at : > 23: run_eval_code_obj > at : > 24: run_mod > at : > 25: Py_RunMain.localalias > at : > 26: __libc_start_call_main > at : > 27: __libc_start_main_alias_2 > at : > 28: _start > at : > > Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. > Run with RUST_BACKTRACE=full to include source snippets. > Traceback (most recent call last): > File "", line 78, in > result = api.evaluate_sample(point) > pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 > > > Location: > tests/tests/test_python_api.rs:156:20 > > 3. gammaloop-integration-tests::test_python_api::python_evaluate_samples_batch_and_momentum_space_have_expected_shape > failure: test failure with exit code 101 > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 01:49:35.908] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:49:35.908] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: > lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: > V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: > GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 > [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' > [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams > [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:49:36.041] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) > [2026-09-14 01:49:36.041] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:49:36.042] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:49:36.042] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:49:36.043] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:49:36.345] @commands::generate INFO : > Integrand generation summary > peak RAM 106.07 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 35ms (45%) │ 20ms (26%) │ 22ms (29%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 55ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 90ms (35%) │ 77ms (30%) │ 89ms (35%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:49:36.346] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 01:49:36.347] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: > at : > 13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 14: ::evaluate_samples_raw > at : > 15: ::run > at : > 16: ::evaluate_samples > at : > 17: ::__pymethod_evaluate_samples__ > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 20: method_vectorcall_VARARGS_KEYWORDS > at : > 21: _PyEval_EvalFrameDefault.localalias > at : > 22: PyEval_EvalCode.localalias > at : > 23: run_eval_code_obj > at : > 24: run_mod > at : > 25: Py_RunMain.localalias > at : > 26: __libc_start_call_main > at : > 27: __libc_start_main_alias_2 > at : > 28: _start > at : > > Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. > Run with RUST_BACKTRACE=full to include source snippets. > Traceback (most recent call last): > File "", line 85, in > batch = summarize_batch_result(api.evaluate_samples(points)) > ~~~~~~~~~~~~~~~~~~~~^^^^^^^^ > pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 > > > ... omitted 2 more lines; see full nextest output above > system-out > running 1 test > test python_evaluate_samples_batch_and_momentum_space_have_expected_shape ... FAILED > > failures: > > failures: > python_evaluate_samples_batch_and_momentum_space_have_expected_shape > > test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 4 filtered out; finished in 0.58s > system-err > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 01:49:35.908] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:49:35.908] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 11 external parameters were forced to zero by the restriction card: > lamWS, AWS, rhoWS, etaWS, ymc, yme, ymm, MC, Me, MM, WTau > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 34 vertex rules were removed by the restriction card: > V_82 -> (c~, d, G+) | V_83 -> (t~, d, G+) | V_84 -> (c~, s, G+) | V_85 -> (t~, s, G+) | V_86 -> (u~, b, G+) | V_87 -> (c~, b, G+) | V_90 -> (c~, d, W+) | V_91 -> (t~, d, W+) | V_92 -> (u~, s, W+) | V_94 -> (t~, s, W+) | V_95 -> (u~, b, W+) | V_96 -> (c~, b, W+) | V_101 -> (e+, e-, G0) | V_102 -> (mu+, mu-, G0) | V_104 -> (e+, e-, H) | V_105 -> (mu+, mu-, H) | V_110 -> (ve~, e-, G+) | V_111 -> (vm~, mu-, G+) | V_116 -> (b~, u, G-) | V_117 -> (d~, c, G-) | V_118 -> (s~, c, G-) | V_119 -> (b~, c, G-) | V_120 -> (d~, t, G-) | V_121 -> (s~, t, G-) | V_124 -> (s~, u, W-) | V_125 -> (b~, u, W-) | V_126 -> (d~, c, W-) | V_128 -> (b~, c, W-) | V_129 -> (d~, t, W-) | V_130 -> (s~, t, W-) | V_138 -> (c~, c, G0) | V_140 -> (c~, c, H) | V_145 -> (e+, ve, G-) | V_146 -> (mu+, vm, G-) > [2026-09-14 01:49:35.935] @gammalooprs::model INFO : The following 36 couplings were removed by the restriction card: > GC_13, GC_14, GC_16, GC_17, GC_18, GC_19, GC_20, GC_22, GC_23, GC_24, GC_25, GC_26, GC_28, GC_29, GC_42, GC_43, GC_44, GC_46, GC_47, GC_48, GC_84, GC_85, GC_86, GC_87, GC_88, GC_89, GC_90, GC_91, GC_92, GC_93, GC_101, GC_102, GC_103, GC_105, GC_106, GC_107 > [2026-09-14 01:49:35.936] @gammaloop_api::se... INFO : Running command set default-runtime kv kinematics.externals='{"type":"constant","data":{"momenta":[[32.0,0.0,0.0,32.0],[32.0,0.0,0.0,-32.0]],"helicities":[1,1]}}' > [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:49:35.937] @gammaloop_api::se... INFO : Running command generate xs e+ e- > d d~ g | e- a d g QED^2==4 [{{2}} QCD=0] --numerator-grouping group_identical_graphs_up_to_sign --clear-existing-processes --only-diagrams > [2026-09-14 01:49:35.939] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:49:35.942] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:49:35.943] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:49:36.041] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after numerator-aware grouping with strategy 'up to a sign': 2 (2 isomorphically unique graphs, 0 color zero, 0 lorentz zero, 1 grouped and 0 cancellation) > [2026-09-14 01:49:36.041] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:49:36.042] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:49:36.042] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:49:36.043] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:49:36.345] @commands::generate INFO : > Integrand generation summary > peak RAM 106.07 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 35ms (45%) │ 20ms (26%) │ 22ms (29%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 55ms (31%) │ 57ms (32%) │ 66ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 90ms (35%) │ 77ms (30%) │ 89ms (35%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:49:36.346] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 01:49:36.347] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_graph_term:: > at : > 13: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 14: ::evaluate_samples_raw > at : > 15: ::run > at : > 16: ::evaluate_samples > at : > 17: ::__pymethod_evaluate_samples__ > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 19: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 20: method_vectorcall_VARARGS_KEYWORDS > at : > 21: _PyEval_EvalFrameDefault.localalias > at : > 22: PyEval_EvalCode.localalias > at : > 23: run_eval_code_obj > at : > 24: run_mod > at : > 25: Py_RunMain.localalias > at : > 26: __libc_start_call_main > at : > 27: __libc_start_main_alias_2 > at : > 28: _start > at : > > Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. > Run with RUST_BACKTRACE=full to include source snippets. > Traceback (most recent call last): > File "", line 85, in > batch = summarize_batch_result(api.evaluate_samples(points)) > ~~~~~~~~~~~~~~~~~~~~^^^^^^^^ > pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 > > > ... omitted 2 more lines; see full nextest output above > ========================================= For full logs, run: nix log /nix/store/01gn8dzfy70val75zfjka0c53k7ic6ry-gammaloop-nextest-python-api.drv [0 built (1 failed), 0.0 Run failed.