$ /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: 77402 remote: Enumerating objects: 86529, 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% (1/2088) remote: Compressing objects: 1% (21/2088) remote: Compressing objects: 2% (42/2088) remote: Compressing objects: 3% (63/2088) remote: Compressing objects: 4% (84/2088) remote: Compressing objects: 5% (105/2088) remote: Compressing objects: 6% (126/2088) remote: Compressing objects: 7% (147/2088) remote: Compressing objects: 8% (168/2088) remote: Compressing objects: 9% (188/2088) remote: Compressing objects: 10% (209/2088) remote: Compressing objects: 11% (230/2088) remote: Compressing objects: 11% (250/2088) remote: Compressing objects: 12% (251/2088) remote: Compressing objects: 13% (272/2088) remote: Compressing objects: 14% (293/2088) remote: Compressing objects: 15% (314/2088) remote: Compressing objects: 16% (335/2088) remote: Compressing objects: 17% (355/2088) remote: Compressing objects: 18% (376/2088) remote: Compressing objects: 19% (397/2088) remote: Compressing objects: 20% (418/2088) remote: Compressing objects: 21% (439/2088) remote: Compressing objects: 22% (460/2088) remote: Compressing objects: 23% (481/2088) remote: Compressing objects: 24% (502/2088) remote: Compressing objects: 25% (522/2088) remote: Compressing objects: 26% (543/2088) remote: Compressing objects: 27% (564/2088) remote: Compressing objects: 28% (585/2088) remote: Compressing objects: 29% (606/2088) remote: Compressing objects: 30% (627/2088) remote: Compressing objects: 31% (648/2088) remote: Compressing objects: 32% (669/2088) remote: Compressing objects: 33% (690/2088) remote: Compressing objects: 34% (710/2088) remote: Compressing objects: 35% (731/2088) remote: Compressing objects: 36% (752/2088) remote: Compressing objects: 37% (773/2088) remote: Compressing objects: 38% (794/2088) remote: Compressing objects: 39% (815/2088) remote: Compressing objects: 40% (836/2088) remote: Compressing objects: 41% (857/2088) remote: Compressing objects: 42% (877/2088) remote: Compressing objects: 43% (898/2088) remote: Compressing objects: 44% (919/2088) remote: Compressing objects: 45% (940/2088) remote: Compressing objects: 46% (961/2088) remote: Compressing objects: 47% (982/2088) remote: Compressing objects: 48% (1003/2088) remote: Compressing objects: 49% (1024/2088) remote: Compressing objects: 50% (1044/2088) remote: Compressing objects: 51% (1065/2088) remote: Compressing objects: 52% (1086/2088) remote: Compressing objects: 53% (1107/2088) remote: Compressing objects: 54% (1128/2088) remote: Compressing objects: 55% (1149/2088) remote: Compressing objects: 56% (1170/2088) remote: Compressing objects: 57% (1191/2088) remote: Compressing objects: 58% (1212/2088) remote: Compressing objects: 59% (1232/2088) remote: Compressing objects: 60% (1253/2088) remote: Compressing objects: 61% (1274/2088) remote: Compressing objects: 62% (1295/2088) remote: Compressing objects: 63% (1316/2088) remote: Compressing objects: 64% (1337/2088) remote: Compressing objects: 65% (1358/2088) remote: Compressing objects: 66% (1379/2088) remote: Compressing objects: 67% (1399/2088) remote: Compressing objects: 68% (1420/2088) remote: Compressing objects: 69% (1441/2088) remote: Compressing objects: 70% (1462/2088) remote: Compressing objects: 71% (1483/2088) remote: Compressing objects: 72% (1504/2088) remote: Compressing objects: 73% (1525/2088) remote: Compressing objects: 74% (1546/2088) remote: Compressing objects: 75% (1566/2088) remote: Compressing objects: 76% (1587/2088) remote: Compressing objects: 77% (1608/2088) remote: Compressing objects: 78% (1629/2088) remote: Compressing objects: 79% (1650/2088) remote: Compressing objects: 80% (1671/2088) remote: Compressing objects: 81% (1692/2088) remote: Compressing objects: 82% (1713/2088) remote: Compressing objects: 83% (1734/2088) remote: Compressing objects: 84% (1754/2088) remote: Compressing objects: 85% (1775/2088) remote: Compressing objects: 86% (1796/2088) remote: Compressing objects: 87% (1817/2088) remote: Compressing objects: 88% (1838/2088) remote: Compressing objects: 89% (1859/2088) remote: Compressing objects: 90% (1880/2088) remote: Compressing objects: 91% (1901/2088) remote: Compressing objects: 92% (1921/2088) remote: Compressing objects: 93% (1942/2088) remote: Compressing objects: 94% (1963/2088) remote: Compressing objects: 95% (1984/2088) remote: Compressing objects: 96% (2005/2088) remote: Compressing objects: 97% (2026/2088) remote: Compressing objects: 98% (2047/2088) remote: Compressing objects: 99% (2068/2088) remote: Compressing objects: 100% (2088/2088) remote: Compressing objects: 100% (2088/2088), done. Receiving objects: 0% (1/86529) Receiving objects: 1% (866/86529) Receiving objects: 2% (1731/86529) Receiving objects: 3% (2596/86529) Receiving objects: 4% (3462/86529) Receiving objects: 5% (4327/86529) Receiving objects: 6% (5192/86529) Receiving objects: 7% (6058/86529) Receiving objects: 8% (6923/86529) Receiving objects: 9% (7788/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 10% (8653/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 11% (9519/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 12% (10384/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 13% (11249/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 14% (12115/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 15% (12980/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 16% (13845/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 17% (14710/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 18% (15576/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 19% (16441/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 20% (17306/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 21% (18172/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 22% (19037/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 23% (19902/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 24% (20767/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 25% (21633/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 26% (22498/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 27% (23363/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 28% (24229/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 29% (25094/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 30% (25959/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 31% (26824/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 32% (27690/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 33% (28555/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 34% (29420/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 35% (30286/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 36% (31151/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 37% (32016/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 38% (32882/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 39% (33747/86529), 16.48 MiB | 32.94 MiB/s Receiving objects: 39% (34119/86529), 34.80 MiB | 34.79 MiB/s Receiving objects: 40% (34612/86529), 34.80 MiB | 34.79 MiB/s Receiving objects: 41% (35477/86529), 34.80 MiB | 34.79 MiB/s Receiving objects: 42% (36343/86529), 34.80 MiB | 34.79 MiB/s Receiving objects: 43% (37208/86529), 34.80 MiB | 34.79 MiB/s Receiving objects: 44% (38073/86529), 34.80 MiB | 34.79 MiB/s Receiving objects: 45% (38939/86529), 34.80 MiB | 34.79 MiB/s Receiving objects: 46% (39804/86529), 34.80 MiB | 34.79 MiB/s Receiving objects: 47% (40669/86529), 34.80 MiB | 34.79 MiB/s Receiving objects: 48% (41534/86529), 34.80 MiB | 34.79 MiB/s Receiving objects: 49% (42400/86529), 34.80 MiB | 34.79 MiB/s Receiving objects: 50% (43265/86529), 34.80 MiB | 34.79 MiB/s Receiving objects: 51% (44130/86529), 34.80 MiB | 34.79 MiB/s Receiving objects: 52% (44996/86529), 53.57 MiB | 35.62 MiB/s Receiving objects: 53% (45861/86529), 53.57 MiB | 35.62 MiB/s Receiving objects: 54% (46726/86529), 53.57 MiB | 35.62 MiB/s Receiving objects: 55% (47591/86529), 53.57 MiB | 35.62 MiB/s Receiving objects: 56% (48457/86529), 53.57 MiB | 35.62 MiB/s Receiving objects: 57% (49322/86529), 53.57 MiB | 35.62 MiB/s Receiving objects: 57% (50042/86529), 53.57 MiB | 35.62 MiB/s Receiving objects: 58% (50187/86529), 69.66 MiB | 34.76 MiB/s Receiving objects: 59% (51053/86529), 69.66 MiB | 34.76 MiB/s Receiving objects: 60% (51918/86529), 69.66 MiB | 34.76 MiB/s Receiving objects: 61% (52783/86529), 69.66 MiB | 34.76 MiB/s Receiving objects: 62% (53648/86529), 69.66 MiB | 34.76 MiB/s Receiving objects: 63% (54514/86529), 69.66 MiB | 34.76 MiB/s Receiving objects: 64% (55379/86529), 69.66 MiB | 34.76 MiB/s Receiving objects: 65% (56244/86529), 69.66 MiB | 34.76 MiB/s Receiving objects: 66% (57110/86529), 69.66 MiB | 34.76 MiB/s Receiving objects: 66% (57341/86529), 103.86 MiB | 34.58 MiB/s Receiving objects: 67% (57975/86529), 103.86 MiB | 34.58 MiB/s Receiving objects: 68% (58840/86529), 103.86 MiB | 34.58 MiB/s Receiving objects: 69% (59706/86529), 103.86 MiB | 34.58 MiB/s Receiving objects: 70% (60571/86529), 103.86 MiB | 34.58 MiB/s Receiving objects: 71% (61436/86529), 103.86 MiB | 34.58 MiB/s Receiving objects: 72% (62301/86529), 103.86 MiB | 34.58 MiB/s Receiving objects: 73% (63167/86529), 103.86 MiB | 34.58 MiB/s Receiving objects: 74% (64032/86529), 103.86 MiB | 34.58 MiB/s Receiving objects: 75% (64897/86529), 122.55 MiB | 34.98 MiB/s Receiving objects: 76% (65763/86529), 122.55 MiB | 34.98 MiB/s Receiving objects: 77% (66628/86529), 122.55 MiB | 34.98 MiB/s Receiving objects: 78% (67493/86529), 122.55 MiB | 34.98 MiB/s Receiving objects: 79% (68358/86529), 122.55 MiB | 34.98 MiB/s Receiving objects: 80% (69224/86529), 122.55 MiB | 34.98 MiB/s Receiving objects: 81% (70089/86529), 122.55 MiB | 34.98 MiB/s Receiving objects: 82% (70954/86529), 122.55 MiB | 34.98 MiB/s Receiving objects: 83% (71820/86529), 122.55 MiB | 34.98 MiB/s Receiving objects: 84% (72685/86529), 122.55 MiB | 34.98 MiB/s Receiving objects: 84% (73245/86529), 122.55 MiB | 34.98 MiB/s Receiving objects: 85% (73550/86529), 139.12 MiB | 34.75 MiB/s Receiving objects: 86% (74415/86529), 139.12 MiB | 34.75 MiB/s Receiving objects: 87% (75281/86529), 139.12 MiB | 34.75 MiB/s Receiving objects: 88% (76146/86529), 139.12 MiB | 34.75 MiB/s Receiving objects: 89% (77011/86529), 139.12 MiB | 34.75 MiB/s Receiving objects: 90% (77877/86529), 139.12 MiB | 34.75 MiB/s Receiving objects: 91% (78742/86529), 139.12 MiB | 34.75 MiB/s Receiving objects: 92% (79607/86529), 139.12 MiB | 34.75 MiB/s Receiving objects: 93% (80472/86529), 139.12 MiB | 34.75 MiB/s Receiving objects: 94% (81338/86529), 139.12 MiB | 34.75 MiB/s Receiving objects: 95% (82203/86529), 139.12 MiB | 34.75 MiB/s Receiving objects: 96% (83068/86529), 139.12 MiB | 34.75 MiB/s Receiving objects: 97% (83934/86529), 139.12 MiB | 34.75 MiB/s Receiving objects: 98% (84799/86529), 139.12 MiB | 34.75 MiB/s Receiving objects: 99% (85664/86529), 139.12 MiB | 34.75 MiB/s remote: Total 86529 (delta 7878), reused 7203 (delta 7033), pack-reused 77402 (from 3) Receiving objects: 100% (86529/86529), 139.12 MiB | 34.75 MiB/s Receiving objects: 100% (86529/86529), 157.06 MiB | 34.92 MiB/s, done. Resolving deltas: 0% (0/58743) Resolving deltas: 1% (588/58743) Resolving deltas: 2% (1175/58743) Resolving deltas: 3% (1763/58743) Resolving deltas: 4% (2350/58743) Resolving deltas: 5% (2938/58743) Resolving deltas: 6% (3525/58743) Resolving deltas: 7% (4113/58743) Resolving deltas: 8% (4700/58743) Resolving deltas: 9% (5287/58743) Resolving deltas: 10% (5875/58743) Resolving deltas: 11% (6462/58743) Resolving deltas: 12% (7050/58743) Resolving deltas: 13% (7637/58743) Resolving deltas: 14% (8225/58743) Resolving deltas: 15% (8813/58743) Resolving deltas: 16% (9399/58743) Resolving deltas: 17% (9987/58743) Resolving deltas: 18% (10574/58743) Resolving deltas: 19% (11162/58743) Resolving deltas: 20% (11749/58743) Resolving deltas: 21% (12337/58743) Resolving deltas: 22% (12924/58743) Resolving deltas: 23% (13511/58743) Resolving deltas: 24% (14099/58743) Resolving deltas: 25% (14687/58743) Resolving deltas: 26% (15274/58743) Resolving deltas: 27% (15861/58743) Resolving deltas: 28% (16449/58743) Resolving deltas: 29% (17038/58743) Resolving deltas: 30% (17623/58743) Resolving deltas: 31% (18211/58743) Resolving deltas: 32% (18798/58743) Resolving deltas: 33% (19387/58743) Resolving deltas: 34% (19973/58743) Resolving deltas: 35% (20564/58743) Resolving deltas: 36% (21148/58743) Resolving deltas: 37% (21736/58743) Resolving deltas: 38% (22325/58743) Resolving deltas: 39% (22911/58743) Resolving deltas: 40% (23498/58743) Resolving deltas: 41% (24086/58743) Resolving deltas: 42% (24673/58743) Resolving deltas: 43% (25260/58743) Resolving deltas: 44% (25847/58743) Resolving deltas: 45% (26436/58743) Resolving deltas: 46% (27022/58743) Resolving deltas: 47% (27610/58743) Resolving deltas: 48% (28197/58743) Resolving deltas: 49% (28785/58743) Resolving deltas: 50% (29372/58743) Resolving deltas: 51% (29959/58743) Resolving deltas: 52% (30547/58743) Resolving deltas: 53% (31136/58743) Resolving deltas: 54% (31722/58743) Resolving deltas: 55% (32309/58743) Resolving deltas: 56% (32897/58743) Resolving deltas: 57% (33484/58743) Resolving deltas: 58% (34071/58743) Resolving deltas: 59% (34659/58743) Resolving deltas: 60% (35246/58743) Resolving deltas: 61% (35834/58743) Resolving deltas: 62% (36421/58743) Resolving deltas: 63% (37009/58743) Resolving deltas: 64% (37596/58743) Resolving deltas: 65% (38183/58743) Resolving deltas: 66% (38771/58743) Resolving deltas: 67% (39358/58743) Resolving deltas: 68% (39946/58743) Resolving deltas: 69% (40533/58743) Resolving deltas: 70% (41121/58743) Resolving deltas: 71% (41708/58743) Resolving deltas: 72% (42297/58743) Resolving deltas: 73% (42883/58743) Resolving deltas: 74% (43474/58743) Resolving deltas: 75% (44059/58743) Resolving deltas: 76% (44645/58743) Resolving deltas: 77% (45233/58743) Resolving deltas: 78% (45820/58743) Resolving deltas: 79% (46407/58743) Resolving deltas: 80% (46995/58743) Resolving deltas: 81% (47585/58743) Resolving deltas: 82% (48170/58743) Resolving deltas: 83% (48757/58743) Resolving deltas: 84% (49345/58743) Resolving deltas: 85% (49932/58743) Resolving deltas: 86% (50519/58743) Resolving deltas: 87% (51107/58743) Resolving deltas: 88% (51694/58743) Resolving deltas: 89% (52282/58743) Resolving deltas: 90% (52869/58743) Resolving deltas: 91% (53457/58743) Resolving deltas: 92% (54044/58743) Resolving deltas: 93% (54631/58743) Resolving deltas: 94% (55219/58743) Resolving deltas: 95% (55806/58743) Resolving deltas: 96% (56396/58743) Resolving deltas: 97% (56981/58743) Resolving deltas: 98% (57569/58743) Resolving deltas: 99% (58156/58743) Resolving deltas: 100% (58743/58743) Resolving deltas: 100% (58743/58743), done. Fetching commit a6efa54ac028cf5ebad1a526ca122d10cf7511f3 for advanced_sampling ... $ /nix/store/bcnisk3ydfgv26v2gw3zlky24g00yww2-git-2.54.0/bin/git fetch origin a6efa54ac028cf5ebad1a526ca122d10cf7511f3 From https://github.com/alphal00p/gammaloop * branch a6efa54ac028cf5ebad1a526ca122d10cf7511f3 -> 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 a6efa54ac028cf5ebad1a526ca122d10cf7511f3 HEAD is now at a6efa54ac retain LU ray data and account for complete sampling work $ /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  evaluating derivation 'g copying '/nix/store/mh8i evaluating derivation 'g   copying '/nix/store/mh8i evaluating derivation 'g copying '/nix/store/mh8i evaluating derivation 'g copying '/nix/store/mh8i evaluating derivation 'g copying '/nix/store/mh8i evaluating derivation 'g copying '/nix/store/mh8i evaluating derivation 'g copying '/nix/store/mh8i evaluating derivation 'g copying '/nix/store/mh8i evaluating derivation 'g copying '/nix/store/mh8i evaluating derivation 'g copying '/nix/store/mh8i evaluating derivation 'g  [0/1 built]  [1/0/1 built] building g gammaloop-nextest-python-api>  Extracting 1 binary, 1 build script output directory, and 3 linked paths to /build/nextest-archive-o2M6Fd gammaloop-nextest-python-api>  Extracted 18 files to /build/nextest-archive-o2M6Fd in 0.06s gammaloop-nextest-python-api> ------------ gammaloop-nextest-python-api>  Nextest run ID a31a960c-743e-4c3e-a736-36ff9fc943a0 with nextest profile: ci_gammaloop gammaloop-nextest-python-api>  Starting 5 tests across 1 binary gammaloop-nextest-python-api>  FAIL [ 0.512s] (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 01:11:09.900] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.900] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.930] @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 01:11:09.930] @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 01:11:09.930] @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 01:11:09.930] @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 01:11:09.931] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:11:09.932] @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 01:11:09.933] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @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 01:11:10.032] @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 01:11:10.032] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:11:10.032] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:11:10.032] @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 01:11:10.033] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:11:10.336] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 98.23 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 (45%) │ 20ms (26%) │ 23ms (29%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 57ms (30%) │ 59ms (32%) │ 71ms (38%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 93ms (35%) │ 80ms (30%) │ 95ms (35%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:11:10.336] @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 01:11:10.337] @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#3}> 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#3}>>::{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#3}>>>::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 [ 0.521s] (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 01:11:09.902] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.902] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.929] @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 01:11:09.929] @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 01:11:09.929] @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 01:11:09.930] @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 01:11:09.931] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:11:09.932] @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 01:11:09.934] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:11:09.936] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @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 01:11:10.040] @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 01:11:10.040] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:11:10.041] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:11:10.041] @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 01:11:10.042] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:11:10.344] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 97.96 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 │ 37ms (46%) │ 20ms (25%) │ 23ms (29%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 57ms (31%) │ 58ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 95ms (36%) │ 78ms (30%) │ 91ms (35%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:11:10.345] @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#3}> 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#3}>>::{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#3}>>>::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 [ 0.564s] (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 0.56s 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 01:11:09.900] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.900] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.928] @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 01:11:09.928] @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 01:11:09.928] @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 01:11:09.928] @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 01:11:09.929] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:11:09.930] @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 01:11:09.932] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:11:09.934] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.936] @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 01:11:10.029] @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 01:11:10.029] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:11:10.029] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:11:10.029] @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 01:11:10.030] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:11:10.333] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 97.86 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 │ 37ms (46%) │ 20ms (25%) │ 23ms (29%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 57ms (31%) │ 58ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 94ms (36%) │ 79ms (30%) │ 91ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:11:10.334] @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 01:11:10.335] @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#3}> 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#3}>>::{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#3}>>>::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 [ 0.566s] 5 tests run: 2 passed, 3 failed, 0 skipped gammaloop-nextest-python-api>  FAIL [ 0.512s] (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 01:11:09.900] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.900] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.930] @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 01:11:09.930] @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 01:11:09.930] @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 01:11:09.930] @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 01:11:09.931] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:11:09.932] @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 01:11:09.933] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @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 01:11:10.032] @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 01:11:10.032] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:11:10.032] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:11:10.032] @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 01:11:10.033] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:11:10.336] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 98.23 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 (45%) │ 20ms (26%) │ 23ms (29%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 57ms (30%) │ 59ms (32%) │ 71ms (38%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 93ms (35%) │ 80ms (30%) │ 95ms (35%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:11:10.336] @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 01:11:10.337] @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#3}> 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#3}>>::{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#3}>>>::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 [ 0.521s] (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 01:11:09.902] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.902] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.929] @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 01:11:09.929] @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 01:11:09.929] @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 01:11:09.930] @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 01:11:09.931] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:11:09.932] @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 01:11:09.934] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:11:09.936] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @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 01:11:10.040] @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 01:11:10.040] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:11:10.041] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:11:10.041] @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 01:11:10.042] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:11:10.344] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 97.96 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 │ 37ms (46%) │ 20ms (25%) │ 23ms (29%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 57ms (31%) │ 58ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 95ms (36%) │ 78ms (30%) │ 91ms (35%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:11:10.345] @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#3}> 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#3}>>::{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#3}>>>::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 [ 0.564s] (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 0.56s 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 01:11:09.900] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.900] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.928] @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 01:11:09.928] @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 01:11:09.928] @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 01:11:09.928] @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 01:11:09.929] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:11:09.930] @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 01:11:09.932] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:11:09.934] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.936] @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 01:11:10.029] @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 01:11:10.029] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:11:10.029] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:11:10.029] @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 01:11:10.030] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:11:10.333] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 97.86 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 │ 37ms (46%) │ 20ms (25%) │ 23ms (29%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 57ms (31%) │ 58ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 94ms (36%) │ 79ms (30%) │ 91ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:11:10.334] @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 01:11:10.335] @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#3}> 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#3}>>::{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#3}>>>::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 01:11:09.900] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.900] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.930] @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 01:11:09.930] @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 01:11:09.930] @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 01:11:09.930] @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 01:11:09.931] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:11:09.932] @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 01:11:09.933] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @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 01:11:10.032] @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 01:11:10.032] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:11:10.032] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:11:10.032] @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 01:11:10.033] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:11:10.336] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 98.23 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 (45%) │ 20ms (26%) │ 23ms (29%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 57ms (30%) │ 59ms (32%) │ 71ms (38%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 93ms (35%) │ 80ms (30%) │ 95ms (35%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:11:10.336] @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 01:11:10.337] @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#3}> 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#3}>>::{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#3}>>>::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 01:11:09.900] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.900] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.930] @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 01:11:09.930] @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 01:11:09.930] @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 01:11:09.930] @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 01:11:09.931] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:11:09.932] @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 01:11:09.933] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @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 01:11:10.032] @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 01:11:10.032] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:11:10.032] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:11:10.032] @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 01:11:10.033] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:11:10.336] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 98.23 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 (45%) │ 20ms (26%) │ 23ms (29%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 57ms (30%) │ 59ms (32%) │ 71ms (38%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 93ms (35%) │ 80ms (30%) │ 95ms (35%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:11:10.336] @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 01:11:10.337] @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#3}> 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#3}>>::{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#3}>>>::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 01:11:09.902] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.902] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.929] @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 01:11:09.929] @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 01:11:09.929] @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 01:11:09.930] @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 01:11:09.931] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:11:09.932] @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 01:11:09.934] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:11:09.936] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @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 01:11:10.040] @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 01:11:10.040] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:11:10.041] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:11:10.041] @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 01:11:10.042] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:11:10.344] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 97.96 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 │ 37ms (46%) │ 20ms (25%) │ 23ms (29%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 57ms (31%) │ 58ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 95ms (36%) │ 78ms (30%) │ 91ms (35%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:11:10.345] @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#3}> 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#3}>>::{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#3}>>>::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 01:11:09.902] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.902] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.929] @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 01:11:09.929] @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 01:11:09.929] @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 01:11:09.930] @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 01:11:09.931] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:11:09.932] @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 01:11:09.934] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:11:09.936] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.938] @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 01:11:10.040] @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 01:11:10.040] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:11:10.041] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:11:10.041] @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 01:11:10.042] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:11:10.344] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 97.96 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 │ 37ms (46%) │ 20ms (25%) │ 23ms (29%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 57ms (31%) │ 58ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 95ms (36%) │ 78ms (30%) │ 91ms (35%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:11:10.345] @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#3}> 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#3}>>::{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#3}>>>::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 01:11:09.900] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.900] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.928] @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 01:11:09.928] @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 01:11:09.928] @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 01:11:09.928] @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 01:11:09.929] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:11:09.930] @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 01:11:09.932] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:11:09.934] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.936] @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 01:11:10.029] @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 01:11:10.029] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:11:10.029] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:11:10.029] @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 01:11:10.030] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:11:10.333] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 97.86 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 │ 37ms (46%) │ 20ms (25%) │ 23ms (29%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 57ms (31%) │ 58ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 94ms (36%) │ 79ms (30%) │ 91ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:11:10.334] @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 01:11:10.335] @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#3}> 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#3}>>::{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#3}>>>::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 0.56s 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 01:11:09.900] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.900] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 01:11:09.928] @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 01:11:09.928] @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 01:11:09.928] @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 01:11:09.928] @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 01:11:09.929] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 01:11:09.930] @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 01:11:09.932] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 01:11:09.934] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 01:11:09.936] @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 01:11:10.029] @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 01:11:10.029] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 01:11:10.029] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 01:11:10.029] @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 01:11:10.030] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 01:11:10.333] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 97.86 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 │ 37ms (46%) │ 20ms (25%) │ 23ms (29%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 57ms (31%) │ 58ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 94ms (36%) │ 79ms (30%) │ 91ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 01:11:10.334] @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 01:11:10.335] @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#3}> 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#3}>>::{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#3}>>>::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/zj9iv3i3rnkdjxrjpfv3yi916lhlmqk8-gammaloop-nextest-python-api.drv'. Reason: builder failed with exit code 100. Output paths: /nix/store/klgqn2jzjdj8m872g3gs0afvj60j2nqf-gammaloop-nextest-python-api Last 1565 log lines: >  Extracting 1 binary, 1 build script output directory, and 3 linked paths to /build/nextest-archive-o2M6Fd >  Extracted 18 files to /build/nextest-archive-o2M6Fd in 0.06s > ------------ >  Nextest run ID a31a960c-743e-4c3e-a736-36ff9fc943a0 with nextest profile: ci_gammaloop >  Starting 5 tests across 1 binary >  FAIL [ 0.512s] (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 01:11:09.900] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:11:09.900] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:11:09.930] @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 01:11:09.930] @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 01:11:09.930] @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 01:11:09.930] @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 01:11:09.931] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:11:09.932] @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 01:11:09.933] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:11:10.032] @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 01:11:10.032] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:11:10.032] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:11:10.032] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:11:10.033] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:11:10.336] @commands::generate INFO : > Integrand generation summary > peak RAM 98.23 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 36ms (45%) │ 20ms (26%) │ 23ms (29%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 57ms (30%) │ 59ms (32%) │ 71ms (38%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 93ms (35%) │ 80ms (30%) │ 95ms (35%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:11:10.336] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 01:11:10.337] @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#3}> 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#3}>>::{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#3}>>>::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 [ 0.521s] (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 01:11:09.902] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:11:09.902] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:11:09.929] @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 01:11:09.929] @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 01:11:09.929] @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 01:11:09.930] @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 01:11:09.931] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:11:09.932] @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 01:11:09.934] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:11:09.936] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:11:10.040] @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 01:11:10.040] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:11:10.041] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:11:10.041] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:11:10.042] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:11:10.344] @commands::generate INFO : > Integrand generation summary > peak RAM 97.96 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 37ms (46%) │ 20ms (25%) │ 23ms (29%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 57ms (31%) │ 58ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 95ms (36%) │ 78ms (30%) │ 91ms (35%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:11:10.345] @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#3}> 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#3}>>::{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#3}>>>::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 [ 0.564s] (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 0.56s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 01:11:09.900] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:11:09.900] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:11:09.928] @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 01:11:09.928] @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 01:11:09.928] @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 01:11:09.928] @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 01:11:09.929] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:11:09.930] @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 01:11:09.932] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:11:09.934] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:11:09.936] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:11:10.029] @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 01:11:10.029] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:11:10.029] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:11:10.029] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:11:10.030] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:11:10.333] @commands::generate INFO : > Integrand generation summary > peak RAM 97.86 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 37ms (46%) │ 20ms (25%) │ 23ms (29%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 57ms (31%) │ 58ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 94ms (36%) │ 79ms (30%) │ 91ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:11:10.334] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 01:11:10.335] @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#3}> 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#3}>>::{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#3}>>>::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 [ 0.566s] 5 tests run: 2 passed, 3 failed, 0 skipped >  FAIL [ 0.512s] (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 01:11:09.900] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:11:09.900] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:11:09.930] @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 01:11:09.930] @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 01:11:09.930] @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 01:11:09.930] @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 01:11:09.931] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:11:09.932] @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 01:11:09.933] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:11:10.032] @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 01:11:10.032] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:11:10.032] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:11:10.032] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:11:10.033] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:11:10.336] @commands::generate INFO : > Integrand generation summary > peak RAM 98.23 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 36ms (45%) │ 20ms (26%) │ 23ms (29%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 57ms (30%) │ 59ms (32%) │ 71ms (38%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 93ms (35%) │ 80ms (30%) │ 95ms (35%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:11:10.336] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 01:11:10.337] @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#3}> 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#3}>>::{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#3}>>>::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 [ 0.521s] (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 01:11:09.902] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:11:09.902] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:11:09.929] @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 01:11:09.929] @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 01:11:09.929] @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 01:11:09.930] @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 01:11:09.931] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:11:09.932] @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 01:11:09.934] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:11:09.936] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:11:10.040] @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 01:11:10.040] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:11:10.041] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:11:10.041] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:11:10.042] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:11:10.344] @commands::generate INFO : > Integrand generation summary > peak RAM 97.96 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 37ms (46%) │ 20ms (25%) │ 23ms (29%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 57ms (31%) │ 58ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 95ms (36%) │ 78ms (30%) │ 91ms (35%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:11:10.345] @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#3}> 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#3}>>::{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#3}>>>::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 [ 0.564s] (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 0.56s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 01:11:09.900] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:11:09.900] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:11:09.928] @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 01:11:09.928] @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 01:11:09.928] @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 01:11:09.928] @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 01:11:09.929] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:11:09.930] @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 01:11:09.932] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:11:09.934] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:11:09.936] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:11:10.029] @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 01:11:10.029] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:11:10.029] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:11:10.029] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:11:10.030] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:11:10.333] @commands::generate INFO : > Integrand generation summary > peak RAM 97.86 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 37ms (46%) │ 20ms (25%) │ 23ms (29%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 57ms (31%) │ 58ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 94ms (36%) │ 79ms (30%) │ 91ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:11:10.334] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 01:11:10.335] @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#3}> 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#3}>>::{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#3}>>>::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 01:11:09.900] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:11:09.900] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:11:09.930] @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 01:11:09.930] @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 01:11:09.930] @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 01:11:09.930] @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 01:11:09.931] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:11:09.932] @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 01:11:09.933] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:11:10.032] @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 01:11:10.032] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:11:10.032] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:11:10.032] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:11:10.033] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:11:10.336] @commands::generate INFO : > Integrand generation summary > peak RAM 98.23 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 36ms (45%) │ 20ms (26%) │ 23ms (29%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 57ms (30%) │ 59ms (32%) │ 71ms (38%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 93ms (35%) │ 80ms (30%) │ 95ms (35%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:11:10.336] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 01:11:10.337] @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#3}> 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#3}>>::{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#3}>>>::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 01:11:09.900] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:11:09.900] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:11:09.930] @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 01:11:09.930] @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 01:11:09.930] @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 01:11:09.930] @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 01:11:09.931] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:11:09.932] @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 01:11:09.933] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:11:10.032] @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 01:11:10.032] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:11:10.032] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:11:10.032] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:11:10.033] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:11:10.336] @commands::generate INFO : > Integrand generation summary > peak RAM 98.23 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 36ms (45%) │ 20ms (26%) │ 23ms (29%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 57ms (30%) │ 59ms (32%) │ 71ms (38%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 93ms (35%) │ 80ms (30%) │ 95ms (35%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:11:10.336] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 01:11:10.337] @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#3}> 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#3}>>::{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#3}>>>::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 01:11:09.902] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:11:09.902] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:11:09.929] @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 01:11:09.929] @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 01:11:09.929] @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 01:11:09.930] @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 01:11:09.931] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:11:09.932] @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 01:11:09.934] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:11:09.936] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:11:10.040] @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 01:11:10.040] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:11:10.041] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:11:10.041] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:11:10.042] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:11:10.344] @commands::generate INFO : > Integrand generation summary > peak RAM 97.96 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 37ms (46%) │ 20ms (25%) │ 23ms (29%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 57ms (31%) │ 58ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 95ms (36%) │ 78ms (30%) │ 91ms (35%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:11:10.345] @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#3}> 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#3}>>::{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#3}>>>::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 01:11:09.902] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:11:09.902] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:11:09.929] @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 01:11:09.929] @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 01:11:09.929] @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 01:11:09.930] @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 01:11:09.931] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:11:09.932] @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 01:11:09.934] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:11:09.936] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:11:09.937] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:11:09.938] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:11:10.040] @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 01:11:10.040] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:11:10.041] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:11:10.041] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:11:10.042] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:11:10.344] @commands::generate INFO : > Integrand generation summary > peak RAM 97.96 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 37ms (46%) │ 20ms (25%) │ 23ms (29%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 57ms (31%) │ 58ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 95ms (36%) │ 78ms (30%) │ 91ms (35%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:11:10.345] @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#3}> 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#3}>>::{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#3}>>>::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 01:11:09.900] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:11:09.900] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:11:09.928] @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 01:11:09.928] @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 01:11:09.928] @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 01:11:09.928] @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 01:11:09.929] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:11:09.930] @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 01:11:09.932] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:11:09.934] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:11:09.936] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:11:10.029] @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 01:11:10.029] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:11:10.029] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:11:10.029] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:11:10.030] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:11:10.333] @commands::generate INFO : > Integrand generation summary > peak RAM 97.86 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 37ms (46%) │ 20ms (25%) │ 23ms (29%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 57ms (31%) │ 58ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 94ms (36%) │ 79ms (30%) │ 91ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:11:10.334] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 01:11:10.335] @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#3}> 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#3}>>::{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#3}>>>::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 0.56s > system-err > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 01:11:09.900] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 01:11:09.900] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 01:11:09.928] @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 01:11:09.928] @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 01:11:09.928] @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 01:11:09.928] @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 01:11:09.929] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 01:11:09.930] @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 01:11:09.932] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 01:11:09.934] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 01:11:09.935] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 01:11:09.936] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 01:11:10.029] @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 01:11:10.029] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 01:11:10.029] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 01:11:10.029] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 01:11:10.030] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 01:11:10.333] @commands::generate INFO : > Integrand generation summary > peak RAM 97.86 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 37ms (46%) │ 20ms (25%) │ 23ms (29%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 57ms (31%) │ 58ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 94ms (36%) │ 79ms (30%) │ 91ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 01:11:10.334] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 01:11:10.335] @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#3}> 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#3}>>::{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#3}>>>::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/zj9iv3i3rnkdjxrjpfv3yi916lhlmqk8-gammaloop-nextest-python-api.drv [0 built (1 failed)] Run failed.