$ /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: 86629, done. remote: Counting objects: 0% (1/9197) remote: Counting objects: 1% (92/9197) remote: Counting objects: 2% (184/9197) remote: Counting objects: 3% (276/9197) remote: Counting objects: 4% (368/9197) remote: Counting objects: 5% (460/9197) remote: Counting objects: 6% (552/9197) remote: Counting objects: 7% (644/9197) remote: Counting objects: 8% (736/9197) remote: Counting objects: 9% (828/9197) remote: Counting objects: 10% (920/9197) remote: Counting objects: 11% (1012/9197) remote: Counting objects: 12% (1104/9197) remote: Counting objects: 13% (1196/9197) remote: Counting objects: 14% (1288/9197) remote: Counting objects: 15% (1380/9197) remote: Counting objects: 16% (1472/9197) remote: Counting objects: 17% (1564/9197) remote: Counting objects: 18% (1656/9197) remote: Counting objects: 19% (1748/9197) remote: Counting objects: 20% (1840/9197) remote: Counting objects: 21% (1932/9197) remote: Counting objects: 22% (2024/9197) remote: Counting objects: 23% (2116/9197) remote: Counting objects: 24% (2208/9197) remote: Counting objects: 25% (2300/9197) remote: Counting objects: 26% (2392/9197) remote: Counting objects: 27% (2484/9197) remote: Counting objects: 28% (2576/9197) remote: Counting objects: 29% (2668/9197) remote: Counting objects: 30% (2760/9197) remote: Counting objects: 31% (2852/9197) remote: Counting objects: 32% (2944/9197) remote: Counting objects: 33% (3036/9197) remote: Counting objects: 34% (3127/9197) remote: Counting objects: 35% (3219/9197) remote: Counting objects: 36% (3311/9197) remote: Counting objects: 37% (3403/9197) remote: Counting objects: 38% (3495/9197) remote: Counting objects: 39% (3587/9197) remote: Counting objects: 40% (3679/9197) remote: Counting objects: 41% (3771/9197) remote: Counting objects: 42% (3863/9197) remote: Counting objects: 43% (3955/9197) remote: Counting objects: 44% (4047/9197) remote: Counting objects: 45% (4139/9197) remote: Counting objects: 46% (4231/9197) remote: Counting objects: 47% (4323/9197) remote: Counting objects: 48% (4415/9197) remote: Counting objects: 49% (4507/9197) remote: Counting objects: 50% (4599/9197) remote: Counting objects: 51% (4691/9197) remote: Counting objects: 52% (4783/9197) remote: Counting objects: 53% (4875/9197) remote: Counting objects: 54% (4967/9197) remote: Counting objects: 55% (5059/9197) remote: Counting objects: 56% (5151/9197) remote: Counting objects: 57% (5243/9197) remote: Counting objects: 58% (5335/9197) remote: Counting objects: 59% (5427/9197) remote: Counting objects: 60% (5519/9197) remote: Counting objects: 61% (5611/9197) remote: Counting objects: 62% (5703/9197) remote: Counting objects: 63% (5795/9197) remote: Counting objects: 64% (5887/9197) remote: Counting objects: 65% (5979/9197) remote: Counting objects: 66% (6071/9197) remote: Counting objects: 67% (6162/9197) remote: Counting objects: 68% (6254/9197) remote: Counting objects: 69% (6346/9197) remote: Counting objects: 70% (6438/9197) remote: Counting objects: 71% (6530/9197) remote: Counting objects: 72% (6622/9197) remote: Counting objects: 73% (6714/9197) remote: Counting objects: 74% (6806/9197) remote: Counting objects: 75% (6898/9197) remote: Counting objects: 76% (6990/9197) remote: Counting objects: 77% (7082/9197) remote: Counting objects: 78% (7174/9197) remote: Counting objects: 79% (7266/9197) remote: Counting objects: 80% (7358/9197) remote: Counting objects: 81% (7450/9197) remote: Counting objects: 82% (7542/9197) remote: Counting objects: 83% (7634/9197) remote: Counting objects: 84% (7726/9197) remote: Counting objects: 85% (7818/9197) remote: Counting objects: 86% (7910/9197) remote: Counting objects: 87% (8002/9197) remote: Counting objects: 88% (8094/9197) remote: Counting objects: 89% (8186/9197) remote: Counting objects: 90% (8278/9197) remote: Counting objects: 91% (8370/9197) remote: Counting objects: 92% (8462/9197) remote: Counting objects: 93% (8554/9197) remote: Counting objects: 94% (8646/9197) remote: Counting objects: 95% (8738/9197) remote: Counting objects: 96% (8830/9197) remote: Counting objects: 97% (8922/9197) remote: Counting objects: 98% (9014/9197) remote: Counting objects: 99% (9106/9197) remote: Counting objects: 100% (9197/9197) remote: Counting objects: 100% (9197/9197), done. remote: Compressing objects: 0% (1/2147) remote: Compressing objects: 1% (22/2147) remote: Compressing objects: 2% (43/2147) remote: Compressing objects: 3% (65/2147) remote: Compressing objects: 4% (86/2147) remote: Compressing objects: 5% (108/2147) remote: Compressing objects: 6% (129/2147) remote: Compressing objects: 7% (151/2147) remote: Compressing objects: 8% (172/2147) remote: Compressing objects: 9% (194/2147) remote: Compressing objects: 10% (215/2147) remote: Compressing objects: 11% (237/2147) remote: Compressing objects: 12% (258/2147) remote: Compressing objects: 12% (273/2147) remote: Compressing objects: 13% (280/2147) remote: Compressing objects: 14% (301/2147) remote: Compressing objects: 15% (323/2147) remote: Compressing objects: 16% (344/2147) remote: Compressing objects: 17% (365/2147) remote: Compressing objects: 18% (387/2147) remote: Compressing objects: 19% (408/2147) remote: Compressing objects: 20% (430/2147) remote: Compressing objects: 21% (451/2147) remote: Compressing objects: 22% (473/2147) remote: Compressing objects: 22% (488/2147) remote: Compressing objects: 23% (494/2147) remote: Compressing objects: 24% (516/2147) remote: Compressing objects: 25% (537/2147) remote: Compressing objects: 26% (559/2147) remote: Compressing objects: 27% (580/2147) remote: Compressing objects: 28% (602/2147) remote: Compressing objects: 29% (623/2147) remote: Compressing objects: 30% (645/2147) remote: Compressing objects: 31% (666/2147) remote: Compressing objects: 32% (688/2147) remote: Compressing objects: 33% (709/2147) remote: Compressing objects: 34% (730/2147) remote: Compressing objects: 35% (752/2147) remote: Compressing objects: 36% (773/2147) remote: Compressing objects: 37% (795/2147) remote: Compressing objects: 38% (816/2147) remote: Compressing objects: 39% (838/2147) remote: Compressing objects: 40% (859/2147) remote: Compressing objects: 41% (881/2147) remote: Compressing objects: 42% (902/2147) remote: Compressing objects: 43% (924/2147) remote: Compressing objects: 44% (945/2147) remote: Compressing objects: 45% (967/2147) remote: Compressing objects: 46% (988/2147) remote: Compressing objects: 47% (1010/2147) remote: Compressing objects: 48% (1031/2147) remote: Compressing objects: 49% (1053/2147) remote: Compressing objects: 50% (1074/2147) remote: Compressing objects: 51% (1095/2147) remote: Compressing objects: 52% (1117/2147) remote: Compressing objects: 53% (1138/2147) remote: Compressing objects: 54% (1160/2147) remote: Compressing objects: 55% (1181/2147) remote: Compressing objects: 56% (1203/2147) remote: Compressing objects: 57% (1224/2147) remote: Compressing objects: 58% (1246/2147) remote: Compressing objects: 59% (1267/2147) remote: Compressing objects: 60% (1289/2147) remote: Compressing objects: 61% (1310/2147) remote: Compressing objects: 62% (1332/2147) remote: Compressing objects: 63% (1353/2147) remote: Compressing objects: 64% (1375/2147) remote: Compressing objects: 65% (1396/2147) remote: Compressing objects: 66% (1418/2147) remote: Compressing objects: 67% (1439/2147) remote: Compressing objects: 68% (1460/2147) remote: Compressing objects: 69% (1482/2147) remote: Compressing objects: 70% (1503/2147) remote: Compressing objects: 71% (1525/2147) remote: Compressing objects: 72% (1546/2147) remote: Compressing objects: 73% (1568/2147) remote: Compressing objects: 74% (1589/2147) remote: Compressing objects: 75% (1611/2147) remote: Compressing objects: 76% (1632/2147) remote: Compressing objects: 77% (1654/2147) remote: Compressing objects: 78% (1675/2147) remote: Compressing objects: 79% (1697/2147) remote: Compressing objects: 80% (1718/2147) remote: Compressing objects: 81% (1740/2147) remote: Compressing objects: 82% (1761/2147) remote: Compressing objects: 83% (1783/2147) remote: Compressing objects: 84% (1804/2147) remote: Compressing objects: 85% (1825/2147) remote: Compressing objects: 86% (1847/2147) remote: Compressing objects: 87% (1868/2147) remote: Compressing objects: 88% (1890/2147) remote: Compressing objects: 89% (1911/2147) remote: Compressing objects: 90% (1933/2147) remote: Compressing objects: 91% (1954/2147) remote: Compressing objects: 92% (1976/2147) remote: Compressing objects: 93% (1997/2147) remote: Compressing objects: 94% (2019/2147) remote: Compressing objects: 95% (2040/2147) remote: Compressing objects: 96% (2062/2147) remote: Compressing objects: 97% (2083/2147) remote: Compressing objects: 98% (2105/2147) remote: Compressing objects: 99% (2126/2147) remote: Compressing objects: 100% (2147/2147) remote: Compressing objects: 100% (2147/2147), done. Receiving objects: 0% (1/86629) Receiving objects: 1% (867/86629) Receiving objects: 2% (1733/86629) Receiving objects: 3% (2599/86629) Receiving objects: 4% (3466/86629) Receiving objects: 5% (4332/86629) Receiving objects: 6% (5198/86629) Receiving objects: 7% (6065/86629) Receiving objects: 8% (6931/86629) Receiving objects: 9% (7797/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 10% (8663/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 11% (9530/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 12% (10396/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 13% (11262/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 14% (12129/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 15% (12995/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 16% (13861/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 17% (14727/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 18% (15594/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 19% (16460/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 20% (17326/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 21% (18193/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 22% (19059/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 23% (19925/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 24% (20791/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 25% (21658/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 26% (22524/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 27% (23390/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 28% (24257/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 29% (25123/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 30% (25989/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 31% (26855/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 32% (27722/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 33% (28588/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 34% (29454/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 35% (30321/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 36% (31187/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 37% (32053/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 38% (32920/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 39% (33786/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 40% (34652/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 41% (35518/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 41% (35702/86629), 16.64 MiB | 33.26 MiB/s Receiving objects: 42% (36385/86629), 37.30 MiB | 37.30 MiB/s Receiving objects: 43% (37251/86629), 37.30 MiB | 37.30 MiB/s Receiving objects: 44% (38117/86629), 37.30 MiB | 37.30 MiB/s Receiving objects: 45% (38984/86629), 37.30 MiB | 37.30 MiB/s Receiving objects: 46% (39850/86629), 37.30 MiB | 37.30 MiB/s Receiving objects: 47% (40716/86629), 37.30 MiB | 37.30 MiB/s Receiving objects: 48% (41582/86629), 37.30 MiB | 37.30 MiB/s Receiving objects: 49% (42449/86629), 37.30 MiB | 37.30 MiB/s Receiving objects: 50% (43315/86629), 37.30 MiB | 37.30 MiB/s Receiving objects: 51% (44181/86629), 37.30 MiB | 37.30 MiB/s Receiving objects: 52% (45048/86629), 54.37 MiB | 36.24 MiB/s Receiving objects: 53% (45914/86629), 54.37 MiB | 36.24 MiB/s Receiving objects: 54% (46780/86629), 54.37 MiB | 36.24 MiB/s Receiving objects: 55% (47646/86629), 54.37 MiB | 36.24 MiB/s Receiving objects: 56% (48513/86629), 54.37 MiB | 36.24 MiB/s Receiving objects: 57% (49379/86629), 54.37 MiB | 36.24 MiB/s Receiving objects: 58% (50245/86629), 54.37 MiB | 36.24 MiB/s Receiving objects: 59% (51112/86629), 54.37 MiB | 36.24 MiB/s Receiving objects: 59% (51279/86629), 73.00 MiB | 36.09 MiB/s Receiving objects: 60% (51978/86629), 73.00 MiB | 36.09 MiB/s Receiving objects: 61% (52844/86629), 73.00 MiB | 36.09 MiB/s Receiving objects: 62% (53710/86629), 73.00 MiB | 36.09 MiB/s Receiving objects: 63% (54577/86629), 73.00 MiB | 36.09 MiB/s Receiving objects: 64% (55443/86629), 73.00 MiB | 36.09 MiB/s Receiving objects: 65% (56309/86629), 73.00 MiB | 36.09 MiB/s Receiving objects: 66% (57176/86629), 73.00 MiB | 36.09 MiB/s Receiving objects: 67% (58042/86629), 92.00 MiB | 36.47 MiB/s Receiving objects: 68% (58908/86629), 92.00 MiB | 36.47 MiB/s Receiving objects: 68% (59277/86629), 92.00 MiB | 36.47 MiB/s Receiving objects: 69% (59775/86629), 92.00 MiB | 36.47 MiB/s Receiving objects: 70% (60641/86629), 92.00 MiB | 36.47 MiB/s Receiving objects: 71% (61507/86629), 110.48 MiB | 36.55 MiB/s Receiving objects: 72% (62373/86629), 110.48 MiB | 36.55 MiB/s Receiving objects: 73% (63240/86629), 110.48 MiB | 36.55 MiB/s Receiving objects: 74% (64106/86629), 110.48 MiB | 36.55 MiB/s Receiving objects: 75% (64972/86629), 127.50 MiB | 36.19 MiB/s Receiving objects: 76% (65839/86629), 127.50 MiB | 36.19 MiB/s Receiving objects: 77% (66705/86629), 127.50 MiB | 36.19 MiB/s Receiving objects: 78% (67571/86629), 127.50 MiB | 36.19 MiB/s Receiving objects: 79% (68437/86629), 127.50 MiB | 36.19 MiB/s Receiving objects: 80% (69304/86629), 127.50 MiB | 36.19 MiB/s Receiving objects: 81% (70170/86629), 127.50 MiB | 36.19 MiB/s Receiving objects: 82% (71036/86629), 127.50 MiB | 36.19 MiB/s Receiving objects: 83% (71903/86629), 127.50 MiB | 36.19 MiB/s Receiving objects: 84% (72769/86629), 127.50 MiB | 36.19 MiB/s Receiving objects: 85% (73635/86629), 127.50 MiB | 36.19 MiB/s Receiving objects: 85% (74151/86629), 146.25 MiB | 36.12 MiB/s Receiving objects: 86% (74501/86629), 146.25 MiB | 36.12 MiB/s Receiving objects: 87% (75368/86629), 146.25 MiB | 36.12 MiB/s Receiving objects: 88% (76234/86629), 146.25 MiB | 36.12 MiB/s Receiving objects: 89% (77100/86629), 146.25 MiB | 36.12 MiB/s Receiving objects: 90% (77967/86629), 146.25 MiB | 36.12 MiB/s Receiving objects: 91% (78833/86629), 146.25 MiB | 36.12 MiB/s Receiving objects: 92% (79699/86629), 146.25 MiB | 36.12 MiB/s Receiving objects: 93% (80565/86629), 146.25 MiB | 36.12 MiB/s Receiving objects: 94% (81432/86629), 146.25 MiB | 36.12 MiB/s Receiving objects: 95% (82298/86629), 146.25 MiB | 36.12 MiB/s Receiving objects: 96% (83164/86629), 146.25 MiB | 36.12 MiB/s Receiving objects: 97% (84031/86629), 146.25 MiB | 36.12 MiB/s Receiving objects: 98% (84897/86629), 146.25 MiB | 36.12 MiB/s Receiving objects: 99% (85763/86629), 146.25 MiB | 36.12 MiB/s remote: Total 86629 (delta 7932), reused 7227 (delta 7044), pack-reused 77432 (from 3) Receiving objects: 100% (86629/86629), 146.25 MiB | 36.12 MiB/s Receiving objects: 100% (86629/86629), 157.29 MiB | 36.41 MiB/s, done. Resolving deltas: 0% (0/58827) Resolving deltas: 1% (589/58827) Resolving deltas: 2% (1177/58827) Resolving deltas: 3% (1765/58827) Resolving deltas: 4% (2354/58827) Resolving deltas: 5% (2944/58827) Resolving deltas: 6% (3531/58827) Resolving deltas: 7% (4118/58827) Resolving deltas: 8% (4707/58827) Resolving deltas: 9% (5295/58827) Resolving deltas: 10% (5888/58827) Resolving deltas: 11% (6471/58827) Resolving deltas: 12% (7060/58827) Resolving deltas: 13% (7650/58827) Resolving deltas: 14% (8236/58827) Resolving deltas: 15% (8826/58827) Resolving deltas: 16% (9413/58827) Resolving deltas: 17% (10001/58827) Resolving deltas: 18% (10590/58827) Resolving deltas: 19% (11178/58827) Resolving deltas: 20% (11766/58827) Resolving deltas: 21% (12354/58827) Resolving deltas: 22% (12942/58827) Resolving deltas: 23% (13532/58827) Resolving deltas: 24% (14119/58827) Resolving deltas: 25% (14707/58827) Resolving deltas: 26% (15296/58827) Resolving deltas: 27% (15884/58827) Resolving deltas: 28% (16472/58827) Resolving deltas: 29% (17060/58827) Resolving deltas: 30% (17649/58827) Resolving deltas: 31% (18237/58827) Resolving deltas: 32% (18825/58827) Resolving deltas: 33% (19413/58827) Resolving deltas: 34% (20002/58827) Resolving deltas: 35% (20590/58827) Resolving deltas: 36% (21178/58827) Resolving deltas: 37% (21767/58827) Resolving deltas: 38% (22355/58827) Resolving deltas: 39% (22943/58827) Resolving deltas: 40% (23531/58827) Resolving deltas: 41% (24120/58827) Resolving deltas: 42% (24708/58827) Resolving deltas: 43% (25296/58827) Resolving deltas: 44% (25885/58827) Resolving deltas: 45% (26473/58827) Resolving deltas: 46% (27061/58827) Resolving deltas: 47% (27649/58827) Resolving deltas: 48% (28237/58827) Resolving deltas: 49% (28826/58827) Resolving deltas: 50% (29414/58827) Resolving deltas: 51% (30004/58827) Resolving deltas: 52% (30591/58827) Resolving deltas: 53% (31179/58827) Resolving deltas: 54% (31767/58827) Resolving deltas: 55% (32355/58827) Resolving deltas: 56% (32944/58827) Resolving deltas: 57% (33532/58827) Resolving deltas: 58% (34121/58827) Resolving deltas: 59% (34708/58827) Resolving deltas: 60% (35297/58827) Resolving deltas: 61% (35886/58827) Resolving deltas: 62% (36473/58827) Resolving deltas: 63% (37062/58827) Resolving deltas: 64% (37650/58827) Resolving deltas: 65% (38238/58827) Resolving deltas: 66% (38826/58827) Resolving deltas: 67% (39415/58827) Resolving deltas: 68% (40003/58827) Resolving deltas: 69% (40591/58827) Resolving deltas: 70% (41179/58827) Resolving deltas: 71% (41769/58827) Resolving deltas: 72% (42356/58827) Resolving deltas: 73% (42944/58827) Resolving deltas: 74% (43532/58827) Resolving deltas: 75% (44121/58827) Resolving deltas: 76% (44709/58827) Resolving deltas: 77% (45297/58827) Resolving deltas: 78% (45886/58827) Resolving deltas: 79% (46474/58827) Resolving deltas: 80% (47062/58827) Resolving deltas: 81% (47650/58827) Resolving deltas: 82% (48239/58827) Resolving deltas: 83% (48830/58827) Resolving deltas: 84% (49415/58827) Resolving deltas: 85% (50003/58827) Resolving deltas: 86% (50592/58827) Resolving deltas: 87% (51180/58827) Resolving deltas: 88% (51768/58827) Resolving deltas: 89% (52357/58827) Resolving deltas: 90% (52945/58827) Resolving deltas: 91% (53533/58827) Resolving deltas: 92% (54121/58827) Resolving deltas: 93% (54710/58827) Resolving deltas: 94% (55298/58827) Resolving deltas: 95% (55886/58827) Resolving deltas: 96% (56474/58827) Resolving deltas: 97% (57063/58827) Resolving deltas: 98% (57651/58827) Resolving deltas: 99% (58239/58827) Resolving deltas: 100% (58827/58827) Resolving deltas: 100% (58827/58827), done. Fetching commit 072c9999ee928e8e9979f92bd5fb16d4f17ca15f for advanced_sampling ... $ /nix/store/bcnisk3ydfgv26v2gw3zlky24g00yww2-git-2.54.0/bin/git fetch origin 072c9999ee928e8e9979f92bd5fb16d4f17ca15f From https://github.com/alphal00p/gammaloop * branch 072c9999ee928e8e9979f92bd5fb16d4f17ca15f -> 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 072c9999ee928e8e9979f92bd5fb16d4f17ca15f HEAD is now at 072c9999e bind hosted joint surfaces and certify native normal accuracy $ /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/k8rz evaluating derivation 'g     copying '/nix/store/k8rz evaluating derivation 'g copying '/nix/store/k8rz evaluating derivation 'g copying '/nix/store/k8rz evaluating derivation 'g copying '/nix/store/k8rz evaluating derivation 'g copying '/nix/store/k8rz evaluating derivation 'g copying '/nix/store/k8rz evaluating derivation 'g copying '/nix/store/k8rz evaluating derivation 'g querying gammaloop-nexte [0/1 built, 0.0 KiB DL]  [1/0/1 built, 0.0 KiB DL gammaloop-nextest-python-api>  Extracting 1 binary, 1 build script output directory, and 3 linked paths to /build/nextest-archive-EAX6JB gammaloop-nextest-python-api>  Extracted 18 files to /build/nextest-archive-EAX6JB in 0.06s gammaloop-nextest-python-api> ------------ gammaloop-nextest-python-api>  Nextest run ID 4ed024f1-75b9-4c57-bc9a-62b75fce0129 with nextest profile: ci_gammaloop gammaloop-nextest-python-api>  Starting 5 tests across 1 binary gammaloop-nextest-python-api>  FAIL [ 0.512s] (2/5) 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 04:22:48.563] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.564] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.591] @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 04:22:48.591] @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 04:22:48.591] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @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 04:22:48.693] @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 04:22:48.693] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 04:22:48.693] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 04:22:48.693] @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 04:22:48.694] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 04:22:48.997] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 101.61 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 │ 44ms (50%) │ 20ms (24%) │ 23ms (26%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 58ms (31%) │ 59ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 102ms (37%) │ 80ms (29%) │ 92ms (33%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 04:22:48.998] @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 04:22:48.999] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=false gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::evaluate_sample gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::__pymethod_evaluate_sample__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: 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>  19: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: _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 [ 0.516s] (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 0.51s 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 04:22:48.565] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.565] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.591] @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 04:22:48.591] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.600] @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 04:22:48.696] @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 04:22:48.696] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 04:22:48.696] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 04:22:48.696] @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 04:22:48.697] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 04:22:49.000] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 101.98 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%) │ 21ms (26%) │ 23ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 57ms (31%) │ 60ms (32%) │ 69ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 95ms (35%) │ 81ms (30%) │ 92ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 04:22:49.001] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true general.store_additional_weights_in_event=true gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::evaluate_sample gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::__pymethod_evaluate_sample__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: 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>  19: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: _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 [ 0.614s] (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 0.61s 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 04:22:48.565] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.565] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.592] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @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 04:22:48.698] @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 04:22:48.698] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 04:22:48.698] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 04:22:48.698] @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 04:22:48.699] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 04:22:49.002] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 101.77 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 │ 38ms (46%) │ 22ms (26%) │ 23ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 63ms (33%) │ 59ms (31%) │ 68ms (36%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 102ms (37%) │ 81ms (29%) │ 91ms (33%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 04:22:49.003] @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 04:22:49.004] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::evaluate_samples gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::__pymethod_evaluate_samples__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: 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>  19: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: _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 [ 0.615s] 5 tests run: 2 passed, 3 failed, 0 skipped gammaloop-nextest-python-api>  FAIL [ 0.512s] (2/5) 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 04:22:48.563] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.564] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.591] @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 04:22:48.591] @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 04:22:48.591] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @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 04:22:48.693] @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 04:22:48.693] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 04:22:48.693] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 04:22:48.693] @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 04:22:48.694] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 04:22:48.997] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 101.61 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 │ 44ms (50%) │ 20ms (24%) │ 23ms (26%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 58ms (31%) │ 59ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 102ms (37%) │ 80ms (29%) │ 92ms (33%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 04:22:48.998] @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 04:22:48.999] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=false gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::evaluate_sample gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::__pymethod_evaluate_sample__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: 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>  19: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: _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 [ 0.516s] (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 0.51s 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 04:22:48.565] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.565] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.591] @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 04:22:48.591] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.600] @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 04:22:48.696] @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 04:22:48.696] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 04:22:48.696] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 04:22:48.696] @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 04:22:48.697] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 04:22:49.000] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 101.98 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%) │ 21ms (26%) │ 23ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 57ms (31%) │ 60ms (32%) │ 69ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 95ms (35%) │ 81ms (30%) │ 92ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 04:22:49.001] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true general.store_additional_weights_in_event=true gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::evaluate_sample gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::__pymethod_evaluate_sample__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: 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>  19: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: _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 [ 0.614s] (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 0.61s 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 04:22:48.565] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.565] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.592] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @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 04:22:48.698] @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 04:22:48.698] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 04:22:48.698] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 04:22:48.698] @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 04:22:48.699] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 04:22:49.002] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 101.77 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 │ 38ms (46%) │ 22ms (26%) │ 23ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 63ms (33%) │ 59ms (31%) │ 68ms (36%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 102ms (37%) │ 81ms (29%) │ 91ms (33%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 04:22:49.003] @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 04:22:49.004] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::evaluate_samples gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::__pymethod_evaluate_samples__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: 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>  19: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: _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 04:22:48.563] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.564] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.591] @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 04:22:48.591] @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 04:22:48.591] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @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 04:22:48.693] @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 04:22:48.693] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 04:22:48.693] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 04:22:48.693] @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 04:22:48.694] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 04:22:48.997] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 101.61 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 │ 44ms (50%) │ 20ms (24%) │ 23ms (26%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 58ms (31%) │ 59ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 102ms (37%) │ 80ms (29%) │ 92ms (33%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 04:22:48.998] @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 04:22:48.999] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=false gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::evaluate_sample gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::__pymethod_evaluate_sample__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: 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>  19: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: _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>  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 04:22:48.563] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.564] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.591] @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 04:22:48.591] @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 04:22:48.591] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @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 04:22:48.693] @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 04:22:48.693] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 04:22:48.693] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 04:22:48.693] @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 04:22:48.694] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 04:22:48.997] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 101.61 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 │ 44ms (50%) │ 20ms (24%) │ 23ms (26%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 58ms (31%) │ 59ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 102ms (37%) │ 80ms (29%) │ 92ms (33%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 04:22:48.998] @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 04:22:48.999] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=false gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::evaluate_sample gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::__pymethod_evaluate_sample__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: 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>  19: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: _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> 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 04:22:48.565] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.565] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.591] @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 04:22:48.591] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.600] @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 04:22:48.696] @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 04:22:48.696] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 04:22:48.696] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 04:22:48.696] @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 04:22:48.697] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 04:22:49.000] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 101.98 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%) │ 21ms (26%) │ 23ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 57ms (31%) │ 60ms (32%) │ 69ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 95ms (35%) │ 81ms (30%) │ 92ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 04:22:49.001] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true general.store_additional_weights_in_event=true gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::evaluate_sample gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::__pymethod_evaluate_sample__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: 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>  19: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: _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 0.51s 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 04:22:48.565] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.565] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.591] @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 04:22:48.591] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.600] @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 04:22:48.696] @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 04:22:48.696] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 04:22:48.696] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 04:22:48.696] @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 04:22:48.697] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 04:22:49.000] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 101.98 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%) │ 21ms (26%) │ 23ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 57ms (31%) │ 60ms (32%) │ 69ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 95ms (35%) │ 81ms (30%) │ 92ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 04:22:49.001] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true general.store_additional_weights_in_event=true gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::evaluate_sample gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::__pymethod_evaluate_sample__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: 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>  19: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: _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 04:22:48.565] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.565] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.592] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @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 04:22:48.698] @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 04:22:48.698] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 04:22:48.698] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 04:22:48.698] @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 04:22:48.699] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 04:22:49.002] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 101.77 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 │ 38ms (46%) │ 22ms (26%) │ 23ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 63ms (33%) │ 59ms (31%) │ 68ms (36%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 102ms (37%) │ 81ms (29%) │ 91ms (33%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 04:22:49.003] @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 04:22:49.004] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::evaluate_samples gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::__pymethod_evaluate_samples__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: 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>  19: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: _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>  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 0.61s 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 04:22:48.565] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.565] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 04:22:48.592] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 04:22:48.599] @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 04:22:48.698] @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 04:22:48.698] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 04:22:48.698] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 04:22:48.698] @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 04:22:48.699] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 04:22:49.002] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 101.77 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 │ 38ms (46%) │ 22ms (26%) │ 23ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 63ms (33%) │ 59ms (31%) │ 68ms (36%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 102ms (37%) │ 81ms (29%) │ 91ms (33%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 04:22:49.003] @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 04:22:49.004] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::evaluate_samples gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::__pymethod_evaluate_samples__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: 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>  19: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: _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> ========================================= [0 built (1 failed), 0.0 error: Cannot build '/nix/store/66j1x39543kg5dqis2p8an918rhhgklr-gammaloop-nextest-python-api.drv'. Reason: builder failed with exit code 100. Output paths: /nix/store/s33y7x5hwksga696cp2gw27rj28q8ak2-gammaloop-nextest-python-api Last 1545 log lines: >  Extracting 1 binary, 1 build script output directory, and 3 linked paths to /build/nextest-archive-EAX6JB >  Extracted 18 files to /build/nextest-archive-EAX6JB in 0.06s > ------------ >  Nextest run ID 4ed024f1-75b9-4c57-bc9a-62b75fce0129 with nextest profile: ci_gammaloop >  Starting 5 tests across 1 binary >  FAIL [ 0.512s] (2/5) 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 04:22:48.563] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 04:22:48.564] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 04:22:48.591] @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 04:22:48.591] @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 04:22:48.591] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 04:22:48.693] @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 04:22:48.693] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 04:22:48.693] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 04:22:48.693] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 04:22:48.694] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 04:22:48.997] @commands::generate INFO : > Integrand generation summary > peak RAM 101.61 MiB | cores 1 > ╭───────────┬───────┬─────────┬─────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 44ms (50%) │ 20ms (24%) │ 23ms (26%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 58ms (31%) │ 59ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 102ms (37%) │ 80ms (29%) │ 92ms (33%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 04:22:48.998] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 04:22:48.999] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=false > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 13: ::evaluate_samples_raw > at : > 14: ::run > at : > 15: ::evaluate_sample > at : > 16: ::__pymethod_evaluate_sample__ > at : > 17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 19: method_vectorcall_VARARGS_KEYWORDS > at : > 20: _PyEval_EvalFrameDefault.localalias > at : > 21: PyEval_EvalCode.localalias > at : > 22: run_eval_code_obj > at : > 23: run_mod > at : > 24: Py_RunMain.localalias > at : > 25: __libc_start_call_main > at : > 26: __libc_start_main_alias_2 > at : > 27: _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 [ 0.516s] (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 0.51s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 04:22:48.565] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 04:22:48.565] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 04:22:48.591] @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 04:22:48.591] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 04:22:48.600] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 04:22:48.696] @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 04:22:48.696] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 04:22:48.696] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 04:22:48.696] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 04:22:48.697] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 04:22:49.000] @commands::generate INFO : > Integrand generation summary > peak RAM 101.98 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 37ms (46%) │ 21ms (26%) │ 23ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 57ms (31%) │ 60ms (32%) │ 69ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 95ms (35%) │ 81ms (30%) │ 92ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 04:22:49.001] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true general.store_additional_weights_in_event=true > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 13: ::evaluate_samples_raw > at : > 14: ::run > at : > 15: ::evaluate_sample > at : > 16: ::__pymethod_evaluate_sample__ > at : > 17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 19: method_vectorcall_VARARGS_KEYWORDS > at : > 20: _PyEval_EvalFrameDefault.localalias > at : > 21: PyEval_EvalCode.localalias > at : > 22: run_eval_code_obj > at : > 23: run_mod > at : > 24: Py_RunMain.localalias > at : > 25: __libc_start_call_main > at : > 26: __libc_start_main_alias_2 > at : > 27: _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 [ 0.614s] (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 0.61s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 04:22:48.565] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 04:22:48.565] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 04:22:48.592] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 04:22:48.698] @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 04:22:48.698] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 04:22:48.698] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 04:22:48.698] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 04:22:48.699] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 04:22:49.002] @commands::generate INFO : > Integrand generation summary > peak RAM 101.77 MiB | cores 1 > ╭───────────┬───────┬─────────┬─────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 38ms (46%) │ 22ms (26%) │ 23ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 63ms (33%) │ 59ms (31%) │ 68ms (36%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 102ms (37%) │ 81ms (29%) │ 91ms (33%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 04:22:49.003] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 04:22:49.004] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 13: ::evaluate_samples_raw > at : > 14: ::run > at : > 15: ::evaluate_samples > at : > 16: ::__pymethod_evaluate_samples__ > at : > 17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 19: method_vectorcall_VARARGS_KEYWORDS > at : > 20: _PyEval_EvalFrameDefault.localalias > at : > 21: PyEval_EvalCode.localalias > at : > 22: run_eval_code_obj > at : > 23: run_mod > at : > 24: Py_RunMain.localalias > at : > 25: __libc_start_call_main > at : > 26: __libc_start_main_alias_2 > at : > 27: _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 [ 0.615s] 5 tests run: 2 passed, 3 failed, 0 skipped >  FAIL [ 0.512s] (2/5) 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 04:22:48.563] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 04:22:48.564] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 04:22:48.591] @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 04:22:48.591] @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 04:22:48.591] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 04:22:48.693] @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 04:22:48.693] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 04:22:48.693] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 04:22:48.693] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 04:22:48.694] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 04:22:48.997] @commands::generate INFO : > Integrand generation summary > peak RAM 101.61 MiB | cores 1 > ╭───────────┬───────┬─────────┬─────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 44ms (50%) │ 20ms (24%) │ 23ms (26%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 58ms (31%) │ 59ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 102ms (37%) │ 80ms (29%) │ 92ms (33%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 04:22:48.998] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 04:22:48.999] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=false > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 13: ::evaluate_samples_raw > at : > 14: ::run > at : > 15: ::evaluate_sample > at : > 16: ::__pymethod_evaluate_sample__ > at : > 17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 19: method_vectorcall_VARARGS_KEYWORDS > at : > 20: _PyEval_EvalFrameDefault.localalias > at : > 21: PyEval_EvalCode.localalias > at : > 22: run_eval_code_obj > at : > 23: run_mod > at : > 24: Py_RunMain.localalias > at : > 25: __libc_start_call_main > at : > 26: __libc_start_main_alias_2 > at : > 27: _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 [ 0.516s] (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 0.51s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 04:22:48.565] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 04:22:48.565] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 04:22:48.591] @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 04:22:48.591] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 04:22:48.600] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 04:22:48.696] @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 04:22:48.696] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 04:22:48.696] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 04:22:48.696] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 04:22:48.697] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 04:22:49.000] @commands::generate INFO : > Integrand generation summary > peak RAM 101.98 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 37ms (46%) │ 21ms (26%) │ 23ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 57ms (31%) │ 60ms (32%) │ 69ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 95ms (35%) │ 81ms (30%) │ 92ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 04:22:49.001] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true general.store_additional_weights_in_event=true > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 13: ::evaluate_samples_raw > at : > 14: ::run > at : > 15: ::evaluate_sample > at : > 16: ::__pymethod_evaluate_sample__ > at : > 17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 19: method_vectorcall_VARARGS_KEYWORDS > at : > 20: _PyEval_EvalFrameDefault.localalias > at : > 21: PyEval_EvalCode.localalias > at : > 22: run_eval_code_obj > at : > 23: run_mod > at : > 24: Py_RunMain.localalias > at : > 25: __libc_start_call_main > at : > 26: __libc_start_main_alias_2 > at : > 27: _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 [ 0.614s] (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 0.61s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 04:22:48.565] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 04:22:48.565] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 04:22:48.592] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 04:22:48.698] @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 04:22:48.698] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 04:22:48.698] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 04:22:48.698] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 04:22:48.699] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 04:22:49.002] @commands::generate INFO : > Integrand generation summary > peak RAM 101.77 MiB | cores 1 > ╭───────────┬───────┬─────────┬─────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 38ms (46%) │ 22ms (26%) │ 23ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 63ms (33%) │ 59ms (31%) │ 68ms (36%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 102ms (37%) │ 81ms (29%) │ 91ms (33%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 04:22:49.003] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 04:22:49.004] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 13: ::evaluate_samples_raw > at : > 14: ::run > at : > 15: ::evaluate_samples > at : > 16: ::__pymethod_evaluate_samples__ > at : > 17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 19: method_vectorcall_VARARGS_KEYWORDS > at : > 20: _PyEval_EvalFrameDefault.localalias > at : > 21: PyEval_EvalCode.localalias > at : > 22: run_eval_code_obj > at : > 23: run_mod > at : > 24: Py_RunMain.localalias > at : > 25: __libc_start_call_main > at : > 26: __libc_start_main_alias_2 > at : > 27: _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 04:22:48.563] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 04:22:48.564] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 04:22:48.591] @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 04:22:48.591] @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 04:22:48.591] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 04:22:48.693] @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 04:22:48.693] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 04:22:48.693] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 04:22:48.693] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 04:22:48.694] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 04:22:48.997] @commands::generate INFO : > Integrand generation summary > peak RAM 101.61 MiB | cores 1 > ╭───────────┬───────┬─────────┬─────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 44ms (50%) │ 20ms (24%) │ 23ms (26%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 58ms (31%) │ 59ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 102ms (37%) │ 80ms (29%) │ 92ms (33%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 04:22:48.998] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 04:22:48.999] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=false > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 13: ::evaluate_samples_raw > at : > 14: ::run > at : > 15: ::evaluate_sample > at : > 16: ::__pymethod_evaluate_sample__ > at : > 17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 19: method_vectorcall_VARARGS_KEYWORDS > at : > 20: _PyEval_EvalFrameDefault.localalias > at : > 21: PyEval_EvalCode.localalias > at : > 22: run_eval_code_obj > at : > 23: run_mod > at : > 24: Py_RunMain.localalias > at : > 25: __libc_start_call_main > at : > 26: __libc_start_main_alias_2 > at : > 27: _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 > 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 04:22:48.563] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 04:22:48.564] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 04:22:48.591] @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 04:22:48.591] @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 04:22:48.591] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 04:22:48.693] @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 04:22:48.693] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 04:22:48.693] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 04:22:48.693] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 04:22:48.694] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 04:22:48.997] @commands::generate INFO : > Integrand generation summary > peak RAM 101.61 MiB | cores 1 > ╭───────────┬───────┬─────────┬─────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 44ms (50%) │ 20ms (24%) │ 23ms (26%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 58ms (31%) │ 59ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 102ms (37%) │ 80ms (29%) │ 92ms (33%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 04:22:48.998] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 04:22:48.999] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=false > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 13: ::evaluate_samples_raw > at : > 14: ::run > at : > 15: ::evaluate_sample > at : > 16: ::__pymethod_evaluate_sample__ > at : > 17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 19: method_vectorcall_VARARGS_KEYWORDS > at : > 20: _PyEval_EvalFrameDefault.localalias > at : > 21: PyEval_EvalCode.localalias > at : > 22: run_eval_code_obj > at : > 23: run_mod > at : > 24: Py_RunMain.localalias > at : > 25: __libc_start_call_main > at : > 26: __libc_start_main_alias_2 > at : > 27: _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 > > 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 04:22:48.565] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 04:22:48.565] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 04:22:48.591] @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 04:22:48.591] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 04:22:48.600] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 04:22:48.696] @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 04:22:48.696] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 04:22:48.696] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 04:22:48.696] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 04:22:48.697] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 04:22:49.000] @commands::generate INFO : > Integrand generation summary > peak RAM 101.98 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 37ms (46%) │ 21ms (26%) │ 23ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 57ms (31%) │ 60ms (32%) │ 69ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 95ms (35%) │ 81ms (30%) │ 92ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 04:22:49.001] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true general.store_additional_weights_in_event=true > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 13: ::evaluate_samples_raw > at : > 14: ::run > at : > 15: ::evaluate_sample > at : > 16: ::__pymethod_evaluate_sample__ > at : > 17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 19: method_vectorcall_VARARGS_KEYWORDS > at : > 20: _PyEval_EvalFrameDefault.localalias > at : > 21: PyEval_EvalCode.localalias > at : > 22: run_eval_code_obj > at : > 23: run_mod > at : > 24: Py_RunMain.localalias > at : > 25: __libc_start_call_main > at : > 26: __libc_start_main_alias_2 > at : > 27: _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 0.51s > system-err > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 04:22:48.565] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 04:22:48.565] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 04:22:48.591] @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 04:22:48.591] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 04:22:48.600] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 04:22:48.696] @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 04:22:48.696] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 04:22:48.696] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 04:22:48.696] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 04:22:48.697] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 04:22:49.000] @commands::generate INFO : > Integrand generation summary > peak RAM 101.98 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 37ms (46%) │ 21ms (26%) │ 23ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 57ms (31%) │ 60ms (32%) │ 69ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 95ms (35%) │ 81ms (30%) │ 92ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 04:22:49.001] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true general.store_additional_weights_in_event=true > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 13: ::evaluate_samples_raw > at : > 14: ::run > at : > 15: ::evaluate_sample > at : > 16: ::__pymethod_evaluate_sample__ > at : > 17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 19: method_vectorcall_VARARGS_KEYWORDS > at : > 20: _PyEval_EvalFrameDefault.localalias > at : > 21: PyEval_EvalCode.localalias > at : > 22: run_eval_code_obj > at : > 23: run_mod > at : > 24: Py_RunMain.localalias > at : > 25: __libc_start_call_main > at : > 26: __libc_start_main_alias_2 > at : > 27: _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 04:22:48.565] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 04:22:48.565] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 04:22:48.592] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 04:22:48.698] @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 04:22:48.698] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 04:22:48.698] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 04:22:48.698] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 04:22:48.699] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 04:22:49.002] @commands::generate INFO : > Integrand generation summary > peak RAM 101.77 MiB | cores 1 > ╭───────────┬───────┬─────────┬─────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 38ms (46%) │ 22ms (26%) │ 23ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 63ms (33%) │ 59ms (31%) │ 68ms (36%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 102ms (37%) │ 81ms (29%) │ 91ms (33%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 04:22:49.003] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 04:22:49.004] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 13: ::evaluate_samples_raw > at : > 14: ::run > at : > 15: ::evaluate_samples > at : > 16: ::__pymethod_evaluate_samples__ > at : > 17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 19: method_vectorcall_VARARGS_KEYWORDS > at : > 20: _PyEval_EvalFrameDefault.localalias > at : > 21: PyEval_EvalCode.localalias > at : > 22: run_eval_code_obj > at : > 23: run_mod > at : > 24: Py_RunMain.localalias > at : > 25: __libc_start_call_main > at : > 26: __libc_start_main_alias_2 > at : > 27: _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 > 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 0.61s > system-err > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 04:22:48.565] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 04:22:48.565] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 04:22:48.592] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.592] @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 04:22:48.593] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 04:22:48.594] @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 04:22:48.596] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 04:22:48.598] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 04:22:48.599] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 04:22:48.698] @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 04:22:48.698] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 04:22:48.698] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 04:22:48.698] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 04:22:48.699] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 04:22:49.002] @commands::generate INFO : > Integrand generation summary > peak RAM 101.77 MiB | cores 1 > ╭───────────┬───────┬─────────┬─────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 38ms (46%) │ 22ms (26%) │ 23ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 63ms (33%) │ 59ms (31%) │ 68ms (36%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 102ms (37%) │ 81ms (29%) │ 91ms (33%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 04:22:49.003] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 04:22:49.004] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true > The application panicked (crashed). > Message: index out of bounds: the len is 0 but the index is 0 > Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 > > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ > 1: ::panic_report > at : > 2: ::into_panic_hook::{closure#0} > at : > 3: std[bcb96dfbba0ab899]::panicking::panic_with_hook > at : > 4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} > at : > 5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: > at : > 6: __rustc[6c289b9f9c454d21]::rust_begin_unwind > at : > 7: core[940e698046960fd5]::panicking::panic_fmt > at : > 8: core[940e698046960fd5]::panicking::panic_bounds_check > at : > 9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> > at : > 10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter > at : > 11: ::evaluate:: > at : > 12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: > at : > 13: ::evaluate_samples_raw > at : > 14: ::run > at : > 15: ::evaluate_samples > at : > 16: ::__pymethod_evaluate_samples__ > at : > 17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: > at : > 18: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> > at : > 19: method_vectorcall_VARARGS_KEYWORDS > at : > 20: _PyEval_EvalFrameDefault.localalias > at : > 21: PyEval_EvalCode.localalias > at : > 22: run_eval_code_obj > at : > 23: run_mod > at : > 24: Py_RunMain.localalias > at : > 25: __libc_start_call_main > at : > 26: __libc_start_main_alias_2 > at : > 27: _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 > ========================================= For full logs, run: nix log /nix/store/66j1x39543kg5dqis2p8an918rhhgklr-gammaloop-nextest-python-api.drv Run failed.