$ /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: 86657, done. remote: Counting objects: 0% (1/9255) remote: Counting objects: 1% (93/9255) remote: Counting objects: 2% (186/9255) remote: Counting objects: 3% (278/9255) remote: Counting objects: 4% (371/9255) remote: Counting objects: 5% (463/9255) remote: Counting objects: 6% (556/9255) remote: Counting objects: 7% (648/9255) remote: Counting objects: 8% (741/9255) remote: Counting objects: 9% (833/9255) remote: Counting objects: 10% (926/9255) remote: Counting objects: 11% (1019/9255) remote: Counting objects: 12% (1111/9255) remote: Counting objects: 13% (1204/9255) remote: Counting objects: 14% (1296/9255) remote: Counting objects: 15% (1389/9255) remote: Counting objects: 16% (1481/9255) remote: Counting objects: 17% (1574/9255) remote: Counting objects: 18% (1666/9255) remote: Counting objects: 19% (1759/9255) remote: Counting objects: 20% (1851/9255) remote: Counting objects: 21% (1944/9255) remote: Counting objects: 22% (2037/9255) remote: Counting objects: 23% (2129/9255) remote: Counting objects: 24% (2222/9255) remote: Counting objects: 25% (2314/9255) remote: Counting objects: 26% (2407/9255) remote: Counting objects: 27% (2499/9255) remote: Counting objects: 28% (2592/9255) remote: Counting objects: 29% (2684/9255) remote: Counting objects: 30% (2777/9255) remote: Counting objects: 31% (2870/9255) remote: Counting objects: 32% (2962/9255) remote: Counting objects: 33% (3055/9255) remote: Counting objects: 34% (3147/9255) remote: Counting objects: 35% (3240/9255) remote: Counting objects: 36% (3332/9255) remote: Counting objects: 37% (3425/9255) remote: Counting objects: 38% (3517/9255) remote: Counting objects: 39% (3610/9255) remote: Counting objects: 40% (3702/9255) remote: Counting objects: 41% (3795/9255) remote: Counting objects: 42% (3888/9255) remote: Counting objects: 43% (3980/9255) remote: Counting objects: 44% (4073/9255) remote: Counting objects: 45% (4165/9255) remote: Counting objects: 46% (4258/9255) remote: Counting objects: 47% (4350/9255) remote: Counting objects: 48% (4443/9255) remote: Counting objects: 49% (4535/9255) remote: Counting objects: 50% (4628/9255) remote: Counting objects: 51% (4721/9255) remote: Counting objects: 52% (4813/9255) remote: Counting objects: 53% (4906/9255) remote: Counting objects: 54% (4998/9255) remote: Counting objects: 55% (5091/9255) remote: Counting objects: 56% (5183/9255) remote: Counting objects: 57% (5276/9255) remote: Counting objects: 58% (5368/9255) remote: Counting objects: 59% (5461/9255) remote: Counting objects: 60% (5553/9255) remote: Counting objects: 61% (5646/9255) remote: Counting objects: 62% (5739/9255) remote: Counting objects: 63% (5831/9255) remote: Counting objects: 64% (5924/9255) remote: Counting objects: 65% (6016/9255) remote: Counting objects: 66% (6109/9255) remote: Counting objects: 67% (6201/9255) remote: Counting objects: 68% (6294/9255) remote: Counting objects: 69% (6386/9255) remote: Counting objects: 70% (6479/9255) remote: Counting objects: 71% (6572/9255) remote: Counting objects: 72% (6664/9255) remote: Counting objects: 73% (6757/9255) remote: Counting objects: 74% (6849/9255) remote: Counting objects: 75% (6942/9255) remote: Counting objects: 76% (7034/9255) remote: Counting objects: 77% (7127/9255) remote: Counting objects: 78% (7219/9255) remote: Counting objects: 79% (7312/9255) remote: Counting objects: 80% (7404/9255) remote: Counting objects: 81% (7497/9255) remote: Counting objects: 82% (7590/9255) remote: Counting objects: 83% (7682/9255) remote: Counting objects: 84% (7775/9255) remote: Counting objects: 85% (7867/9255) remote: Counting objects: 86% (7960/9255) remote: Counting objects: 87% (8052/9255) remote: Counting objects: 88% (8145/9255) remote: Counting objects: 89% (8237/9255) remote: Counting objects: 90% (8330/9255) remote: Counting objects: 91% (8423/9255) remote: Counting objects: 92% (8515/9255) remote: Counting objects: 93% (8608/9255) remote: Counting objects: 94% (8700/9255) remote: Counting objects: 95% (8793/9255) remote: Counting objects: 96% (8885/9255) remote: Counting objects: 97% (8978/9255) remote: Counting objects: 98% (9070/9255) remote: Counting objects: 99% (9163/9255) remote: Counting objects: 100% (9255/9255) remote: Counting objects: 100% (9255/9255), done. remote: Compressing objects: 0% (1/2179) remote: Compressing objects: 1% (22/2179) remote: Compressing objects: 2% (44/2179) remote: Compressing objects: 3% (66/2179) remote: Compressing objects: 4% (88/2179) remote: Compressing objects: 5% (109/2179) remote: Compressing objects: 6% (131/2179) remote: Compressing objects: 7% (153/2179) remote: Compressing objects: 8% (175/2179) remote: Compressing objects: 9% (197/2179) remote: Compressing objects: 10% (218/2179) remote: Compressing objects: 11% (240/2179) remote: Compressing objects: 12% (262/2179) remote: Compressing objects: 13% (284/2179) remote: Compressing objects: 13% (292/2179) remote: Compressing objects: 14% (306/2179) remote: Compressing objects: 15% (327/2179) remote: Compressing objects: 16% (349/2179) remote: Compressing objects: 17% (371/2179) remote: Compressing objects: 18% (393/2179) remote: Compressing objects: 19% (415/2179) remote: Compressing objects: 20% (436/2179) remote: Compressing objects: 21% (458/2179) remote: Compressing objects: 22% (480/2179) remote: Compressing objects: 23% (502/2179) remote: Compressing objects: 23% (513/2179) remote: Compressing objects: 24% (523/2179) remote: Compressing objects: 25% (545/2179) remote: Compressing objects: 26% (567/2179) remote: Compressing objects: 27% (589/2179) remote: Compressing objects: 28% (611/2179) remote: Compressing objects: 29% (632/2179) remote: Compressing objects: 30% (654/2179) remote: Compressing objects: 31% (676/2179) remote: Compressing objects: 32% (698/2179) remote: Compressing objects: 33% (720/2179) remote: Compressing objects: 34% (741/2179) remote: Compressing objects: 35% (763/2179) remote: Compressing objects: 36% (785/2179) remote: Compressing objects: 37% (807/2179) remote: Compressing objects: 38% (829/2179) remote: Compressing objects: 39% (850/2179) remote: Compressing objects: 40% (872/2179) remote: Compressing objects: 41% (894/2179) remote: Compressing objects: 42% (916/2179) remote: Compressing objects: 43% (937/2179) remote: Compressing objects: 44% (959/2179) remote: Compressing objects: 45% (981/2179) remote: Compressing objects: 46% (1003/2179) remote: Compressing objects: 47% (1025/2179) remote: Compressing objects: 48% (1046/2179) remote: Compressing objects: 49% (1068/2179) remote: Compressing objects: 50% (1090/2179) remote: Compressing objects: 51% (1112/2179) remote: Compressing objects: 52% (1134/2179) remote: Compressing objects: 53% (1155/2179) remote: Compressing objects: 54% (1177/2179) remote: Compressing objects: 55% (1199/2179) remote: Compressing objects: 56% (1221/2179) remote: Compressing objects: 57% (1243/2179) remote: Compressing objects: 58% (1264/2179) remote: Compressing objects: 59% (1286/2179) remote: Compressing objects: 60% (1308/2179) remote: Compressing objects: 61% (1330/2179) remote: Compressing objects: 62% (1351/2179) remote: Compressing objects: 63% (1373/2179) remote: Compressing objects: 64% (1395/2179) remote: Compressing objects: 65% (1417/2179) remote: Compressing objects: 66% (1439/2179) remote: Compressing objects: 67% (1460/2179) remote: Compressing objects: 68% (1482/2179) remote: Compressing objects: 69% (1504/2179) remote: Compressing objects: 70% (1526/2179) remote: Compressing objects: 71% (1548/2179) remote: Compressing objects: 72% (1569/2179) remote: Compressing objects: 73% (1591/2179) remote: Compressing objects: 74% (1613/2179) remote: Compressing objects: 75% (1635/2179) remote: Compressing objects: 76% (1657/2179) remote: Compressing objects: 77% (1678/2179) remote: Compressing objects: 78% (1700/2179) remote: Compressing objects: 79% (1722/2179) remote: Compressing objects: 80% (1744/2179) remote: Compressing objects: 81% (1765/2179) remote: Compressing objects: 82% (1787/2179) remote: Compressing objects: 83% (1809/2179) remote: Compressing objects: 84% (1831/2179) remote: Compressing objects: 85% (1853/2179) remote: Compressing objects: 86% (1874/2179) remote: Compressing objects: 87% (1896/2179) remote: Compressing objects: 88% (1918/2179) remote: Compressing objects: 89% (1940/2179) remote: Compressing objects: 90% (1962/2179) remote: Compressing objects: 91% (1983/2179) remote: Compressing objects: 92% (2005/2179) remote: Compressing objects: 93% (2027/2179) remote: Compressing objects: 94% (2049/2179) remote: Compressing objects: 95% (2071/2179) remote: Compressing objects: 96% (2092/2179) remote: Compressing objects: 97% (2114/2179) remote: Compressing objects: 98% (2136/2179) remote: Compressing objects: 99% (2158/2179) remote: Compressing objects: 100% (2179/2179) remote: Compressing objects: 100% (2179/2179), done. Receiving objects: 0% (1/86657) Receiving objects: 1% (867/86657) Receiving objects: 2% (1734/86657) Receiving objects: 3% (2600/86657) Receiving objects: 4% (3467/86657) Receiving objects: 5% (4333/86657) Receiving objects: 6% (5200/86657) Receiving objects: 7% (6066/86657) Receiving objects: 8% (6933/86657) Receiving objects: 9% (7800/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 10% (8666/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 11% (9533/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 12% (10399/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 13% (11266/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 14% (12132/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 15% (12999/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 16% (13866/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 17% (14732/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 18% (15599/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 19% (16465/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 20% (17332/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 21% (18198/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 22% (19065/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 23% (19932/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 24% (20798/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 25% (21665/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 26% (22531/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 27% (23398/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 28% (24264/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 29% (25131/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 30% (25998/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 31% (26864/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 32% (27731/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 33% (28597/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 34% (29464/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 35% (30330/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 36% (31197/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 37% (32064/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 38% (32930/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 39% (33797/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 39% (33919/86657), 11.64 MiB | 23.26 MiB/s Receiving objects: 40% (34663/86657), 32.72 MiB | 32.71 MiB/s Receiving objects: 41% (35530/86657), 32.72 MiB | 32.71 MiB/s Receiving objects: 42% (36396/86657), 32.72 MiB | 32.71 MiB/s Receiving objects: 43% (37263/86657), 32.72 MiB | 32.71 MiB/s Receiving objects: 44% (38130/86657), 32.72 MiB | 32.71 MiB/s Receiving objects: 45% (38996/86657), 32.72 MiB | 32.71 MiB/s Receiving objects: 46% (39863/86657), 32.72 MiB | 32.71 MiB/s Receiving objects: 47% (40729/86657), 32.72 MiB | 32.71 MiB/s Receiving objects: 48% (41596/86657), 32.72 MiB | 32.71 MiB/s Receiving objects: 49% (42462/86657), 32.72 MiB | 32.71 MiB/s Receiving objects: 50% (43329/86657), 50.59 MiB | 33.72 MiB/s Receiving objects: 51% (44196/86657), 50.59 MiB | 33.72 MiB/s Receiving objects: 52% (45062/86657), 50.59 MiB | 33.72 MiB/s Receiving objects: 53% (45929/86657), 50.59 MiB | 33.72 MiB/s Receiving objects: 54% (46795/86657), 50.59 MiB | 33.72 MiB/s Receiving objects: 55% (47662/86657), 50.59 MiB | 33.72 MiB/s Receiving objects: 56% (48528/86657), 50.59 MiB | 33.72 MiB/s Receiving objects: 56% (49210/86657), 50.59 MiB | 33.72 MiB/s Receiving objects: 57% (49395/86657), 67.98 MiB | 33.99 MiB/s Receiving objects: 58% (50262/86657), 67.98 MiB | 33.99 MiB/s Receiving objects: 59% (51128/86657), 67.98 MiB | 33.99 MiB/s Receiving objects: 60% (51995/86657), 67.98 MiB | 33.99 MiB/s Receiving objects: 61% (52861/86657), 67.98 MiB | 33.99 MiB/s Receiving objects: 62% (53728/86657), 67.98 MiB | 33.99 MiB/s Receiving objects: 63% (54594/86657), 67.98 MiB | 33.99 MiB/s Receiving objects: 64% (55461/86657), 67.98 MiB | 33.99 MiB/s Receiving objects: 65% (56328/86657), 67.98 MiB | 33.99 MiB/s Receiving objects: 66% (57194/86657), 67.98 MiB | 33.99 MiB/s Receiving objects: 66% (57348/86657), 104.15 MiB | 34.70 MiB/s Receiving objects: 67% (58061/86657), 104.15 MiB | 34.70 MiB/s Receiving objects: 68% (58927/86657), 104.15 MiB | 34.70 MiB/s Receiving objects: 69% (59794/86657), 104.15 MiB | 34.70 MiB/s Receiving objects: 70% (60660/86657), 104.15 MiB | 34.70 MiB/s Receiving objects: 71% (61527/86657), 104.15 MiB | 34.70 MiB/s Receiving objects: 72% (62394/86657), 104.15 MiB | 34.70 MiB/s Receiving objects: 73% (63260/86657), 104.15 MiB | 34.70 MiB/s Receiving objects: 74% (64127/86657), 121.76 MiB | 34.78 MiB/s Receiving objects: 75% (64993/86657), 121.76 MiB | 34.78 MiB/s Receiving objects: 76% (65860/86657), 121.76 MiB | 34.78 MiB/s Receiving objects: 77% (66726/86657), 121.76 MiB | 34.78 MiB/s Receiving objects: 78% (67593/86657), 121.76 MiB | 34.78 MiB/s Receiving objects: 79% (68460/86657), 121.76 MiB | 34.78 MiB/s Receiving objects: 80% (69326/86657), 121.76 MiB | 34.78 MiB/s Receiving objects: 81% (70193/86657), 121.76 MiB | 34.78 MiB/s Receiving objects: 82% (71059/86657), 121.76 MiB | 34.78 MiB/s Receiving objects: 83% (71926/86657), 121.76 MiB | 34.78 MiB/s Receiving objects: 84% (72792/86657), 121.76 MiB | 34.78 MiB/s Receiving objects: 85% (73659/86657), 121.76 MiB | 34.78 MiB/s Receiving objects: 85% (73938/86657), 140.18 MiB | 35.02 MiB/s Receiving objects: 86% (74526/86657), 140.18 MiB | 35.02 MiB/s Receiving objects: 87% (75392/86657), 140.18 MiB | 35.02 MiB/s Receiving objects: 88% (76259/86657), 140.18 MiB | 35.02 MiB/s Receiving objects: 89% (77125/86657), 140.18 MiB | 35.02 MiB/s Receiving objects: 90% (77992/86657), 140.18 MiB | 35.02 MiB/s Receiving objects: 91% (78858/86657), 140.18 MiB | 35.02 MiB/s Receiving objects: 92% (79725/86657), 140.18 MiB | 35.02 MiB/s Receiving objects: 93% (80592/86657), 140.18 MiB | 35.02 MiB/s Receiving objects: 94% (81458/86657), 140.18 MiB | 35.02 MiB/s Receiving objects: 95% (82325/86657), 140.18 MiB | 35.02 MiB/s Receiving objects: 96% (83191/86657), 140.18 MiB | 35.02 MiB/s Receiving objects: 97% (84058/86657), 140.18 MiB | 35.02 MiB/s Receiving objects: 98% (84924/86657), 140.18 MiB | 35.02 MiB/s Receiving objects: 99% (85791/86657), 140.18 MiB | 35.02 MiB/s remote: Total 86657 (delta 7967), reused 7276 (delta 7070), pack-reused 77402 (from 3) Receiving objects: 100% (86657/86657), 140.18 MiB | 35.02 MiB/s Receiving objects: 100% (86657/86657), 158.19 MiB | 35.18 MiB/s, done. Resolving deltas: 0% (0/58832) Resolving deltas: 1% (589/58832) Resolving deltas: 2% (1177/58832) Resolving deltas: 3% (1765/58832) Resolving deltas: 4% (2354/58832) Resolving deltas: 5% (2944/58832) Resolving deltas: 6% (3531/58832) Resolving deltas: 7% (4119/58832) Resolving deltas: 8% (4708/58832) Resolving deltas: 9% (5295/58832) Resolving deltas: 10% (5884/58832) Resolving deltas: 11% (6472/58832) Resolving deltas: 12% (7060/58832) Resolving deltas: 13% (7649/58832) Resolving deltas: 14% (8237/58832) Resolving deltas: 15% (8827/58832) Resolving deltas: 16% (9414/58832) Resolving deltas: 17% (10002/58832) Resolving deltas: 18% (10590/58832) Resolving deltas: 19% (11179/58832) Resolving deltas: 20% (11767/58832) Resolving deltas: 21% (12355/58832) Resolving deltas: 22% (12946/58832) Resolving deltas: 23% (13532/58832) Resolving deltas: 24% (14121/58832) Resolving deltas: 25% (14710/58832) Resolving deltas: 26% (15297/58832) Resolving deltas: 27% (15885/58832) Resolving deltas: 28% (16473/58832) Resolving deltas: 29% (17063/58832) Resolving deltas: 30% (17651/58832) Resolving deltas: 31% (18238/58832) Resolving deltas: 32% (18827/58832) Resolving deltas: 33% (19415/58832) Resolving deltas: 34% (20003/58832) Resolving deltas: 35% (20592/58832) Resolving deltas: 36% (21180/58832) Resolving deltas: 37% (21768/58832) Resolving deltas: 38% (22358/58832) Resolving deltas: 39% (22945/58832) Resolving deltas: 40% (23533/58832) Resolving deltas: 41% (24122/58832) Resolving deltas: 42% (24711/58832) Resolving deltas: 43% (25298/58832) Resolving deltas: 44% (25887/58832) Resolving deltas: 45% (26475/58832) Resolving deltas: 46% (27063/58832) Resolving deltas: 47% (27652/58832) Resolving deltas: 48% (28240/58832) Resolving deltas: 49% (28828/58832) Resolving deltas: 50% (29416/58832) Resolving deltas: 51% (30005/58832) Resolving deltas: 52% (30595/58832) Resolving deltas: 53% (31182/58832) Resolving deltas: 54% (31770/58832) Resolving deltas: 55% (32358/58832) Resolving deltas: 56% (32946/58832) Resolving deltas: 57% (33538/58832) Resolving deltas: 58% (34123/58832) Resolving deltas: 59% (34711/58832) Resolving deltas: 60% (35300/58832) Resolving deltas: 61% (35888/58832) Resolving deltas: 62% (36476/58832) Resolving deltas: 63% (37065/58832) Resolving deltas: 64% (37653/58832) Resolving deltas: 65% (38241/58832) Resolving deltas: 66% (38830/58832) Resolving deltas: 67% (39418/58832) Resolving deltas: 68% (40006/58832) Resolving deltas: 69% (40595/58832) Resolving deltas: 70% (41183/58832) Resolving deltas: 71% (41772/58832) Resolving deltas: 72% (42360/58832) Resolving deltas: 73% (42950/58832) Resolving deltas: 74% (43536/58832) Resolving deltas: 75% (44124/58832) Resolving deltas: 76% (44713/58832) Resolving deltas: 77% (45301/58832) Resolving deltas: 78% (45889/58832) Resolving deltas: 79% (46479/58832) Resolving deltas: 80% (47066/58832) Resolving deltas: 81% (47655/58832) Resolving deltas: 82% (48243/58832) Resolving deltas: 83% (48831/58832) Resolving deltas: 84% (49419/58832) Resolving deltas: 85% (50008/58832) Resolving deltas: 86% (50596/58832) Resolving deltas: 87% (51184/58832) Resolving deltas: 88% (51773/58832) Resolving deltas: 89% (52361/58832) Resolving deltas: 90% (52949/58832) Resolving deltas: 91% (53538/58832) Resolving deltas: 92% (54126/58832) Resolving deltas: 93% (54715/58832) Resolving deltas: 94% (55303/58832) Resolving deltas: 95% (55891/58832) Resolving deltas: 96% (56479/58832) Resolving deltas: 97% (57069/58832) Resolving deltas: 98% (57657/58832) Resolving deltas: 99% (58247/58832) Resolving deltas: 100% (58832/58832) Resolving deltas: 100% (58832/58832), done. Fetching commit c8850207ef74b1425e5e63edcd051128a90edaf6 for advanced_sampling ... $ /nix/store/bcnisk3ydfgv26v2gw3zlky24g00yww2-git-2.54.0/bin/git fetch origin c8850207ef74b1425e5e63edcd051128a90edaf6 From https://github.com/alphal00p/gammaloop * branch c8850207ef74b1425e5e63edcd051128a90edaf6 -> 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 c8850207ef74b1425e5e63edcd051128a90edaf6 HEAD is now at c8850207e record full-orientation joint sampling cost and stability failures $ /nix/store/9ypz3flqsrl5xl495mm8h645gadjsxi1-coreutils-9.11/bin/timeout --kill-after=15s 7200s /nix/store/23zk8sgzamrbmj1fday15szf7f2279s8-nix-2.34.7/bin/nix --extra-experimental-features nix-command --extra-experimental-features flakes --log-format internal-json run .#packages.x86_64-linux.nix-ci-check-gammaloop-nextest-python-api --print-build-logs  Downloading cached gammaloop-nextest-binaries-python-api-gammaloop-integration-tests from https://cache.nix-ci.com Downloading cached gammaloop-python-module from https://cache.nix-ci.com Downloaded cached gammaloop-nextest-binaries-python-api-gammaloop-integration-tests (8.5 MiB) in 440ms Progress: 0 of 1 built, 1 of 4 downloaded from cache (1 downloading) Downloading cached gammaloop-nextest-binaries-python-api from https://cache.nix-ci.com Downloaded cached gammaloop-nextest-binaries-python-api (520 B) in 130ms Progress: 0 of 1 built, 2 of 4 downloaded from cache (1 downloading) Downloaded cached gammaloop-python-module (148.6 MiB) in 1.8s Progress: 0 of 1 built, 3 of 4 downloaded from cache Downloading cached nix-ci-check-gammaloop-nextest-python-api from https://cache.nix-ci.com Downloaded cached nix-ci-check-gammaloop-nextest-python-api (1104 B) in 59ms Progress: 0 of 1 built, 4 of 4 downloaded from cache evaluating derivation 'g copying '/nix/store/j0vf evaluating derivation 'g     copying '/nix/store/j0vf evaluating derivation 'g copying '/nix/store/j0vf evaluating derivation 'g copying '/nix/store/j0vf evaluating derivation 'g copying '/nix/store/j0vf evaluating derivation 'g copying '/nix/store/j0vf evaluating derivation 'g copying '/nix/store/j0vf evaluating derivation 'g copying '/nix/store/j0vf evaluating derivation 'g copying '/nix/store/j0vf evaluating derivation 'g copying '/nix/store/j0vf 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-ypJe6I gammaloop-nextest-python-api>  Extracted 18 files to /build/nextest-archive-ypJe6I in 0.08s gammaloop-nextest-python-api> ------------ gammaloop-nextest-python-api>  Nextest run ID 50931996-a83d-4fbe-a663-15b57ec792be with nextest profile: ci_gammaloop gammaloop-nextest-python-api>  Starting 5 tests across 1 binary gammaloop-nextest-python-api>  FAIL [ 0.539s] (3/5) 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 0.53s 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 05:18:31.988] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:31.988] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:32.020] @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 05:18:32.020] @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 05:18:32.020] @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 05:18:32.021] @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 05:18:32.022] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 05:18:32.022] @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 05:18:32.024] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.029] @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 05:18:32.126] @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 05:18:32.126] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 05:18:32.127] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 05:18:32.127] @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 05:18:32.127] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 05:18:32.432] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 106.50 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 39ms (45%) │ 22ms (25%) │ 26ms (30%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 57ms (31%) │ 60ms (33%) │ 68ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 97ms (35%) │ 83ms (30%) │ 94ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 05:18:32.433] @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 [ 0.539s] (4/5) 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 0.53s 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 05:18:31.988] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:31.988] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:32.018] @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 05:18:32.018] @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 05:18:32.018] @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 05:18:32.019] @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 05:18:32.019] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 05:18:32.020] @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 05:18:32.022] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @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 05:18:32.125] @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 05:18:32.125] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 05:18:32.125] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 05:18:32.125] @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 05:18:32.126] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 05:18:32.431] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 106.16 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 │ 40ms (48%) │ 20ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 58ms (31%) │ 60ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 99ms (36%) │ 81ms (30%) │ 92ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 05:18:32.432] @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 05:18:32.433] @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 [ 0.659s] (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 0.65s 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 05:18:31.990] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:31.990] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:32.019] @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 05:18:32.019] @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 05:18:32.019] @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 05:18:32.020] @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 05:18:32.021] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 05:18:32.022] @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 05:18:32.023] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @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 05:18:32.124] @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 05:18:32.124] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 05:18:32.124] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 05:18:32.125] @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 05:18:32.126] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 05:18:32.429] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 104.43 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 39ms (47%) │ 21ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 59ms (30%) │ 64ms (33%) │ 73ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 98ms (35%) │ 85ms (30%) │ 96ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 05:18:32.430] @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 05:18:32.431] @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 [ 0.660s] 5 tests run: 2 passed, 3 failed, 0 skipped gammaloop-nextest-python-api>  FAIL [ 0.539s] (3/5) 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 0.53s 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 05:18:31.988] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:31.988] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:32.020] @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 05:18:32.020] @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 05:18:32.020] @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 05:18:32.021] @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 05:18:32.022] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 05:18:32.022] @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 05:18:32.024] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.029] @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 05:18:32.126] @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 05:18:32.126] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 05:18:32.127] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 05:18:32.127] @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 05:18:32.127] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 05:18:32.432] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 106.50 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 39ms (45%) │ 22ms (25%) │ 26ms (30%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 57ms (31%) │ 60ms (33%) │ 68ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 97ms (35%) │ 83ms (30%) │ 94ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 05:18:32.433] @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 [ 0.539s] (4/5) 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 0.53s 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 05:18:31.988] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:31.988] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:32.018] @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 05:18:32.018] @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 05:18:32.018] @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 05:18:32.019] @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 05:18:32.019] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 05:18:32.020] @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 05:18:32.022] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @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 05:18:32.125] @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 05:18:32.125] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 05:18:32.125] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 05:18:32.125] @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 05:18:32.126] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 05:18:32.431] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 106.16 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 │ 40ms (48%) │ 20ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 58ms (31%) │ 60ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 99ms (36%) │ 81ms (30%) │ 92ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 05:18:32.432] @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 05:18:32.433] @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 [ 0.659s] (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 0.65s 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 05:18:31.990] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:31.990] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:32.019] @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 05:18:32.019] @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 05:18:32.019] @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 05:18:32.020] @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 05:18:32.021] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 05:18:32.022] @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 05:18:32.023] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @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 05:18:32.124] @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 05:18:32.124] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 05:18:32.124] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 05:18:32.125] @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 05:18:32.126] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 05:18:32.429] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 104.43 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 39ms (47%) │ 21ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 59ms (30%) │ 64ms (33%) │ 73ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 98ms (35%) │ 85ms (30%) │ 96ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 05:18:32.430] @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 05:18:32.431] @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_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 05:18:31.988] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:31.988] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:32.020] @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 05:18:32.020] @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 05:18:32.020] @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 05:18:32.021] @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 05:18:32.022] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 05:18:32.022] @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 05:18:32.024] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.029] @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 05:18:32.126] @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 05:18:32.126] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 05:18:32.127] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 05:18:32.127] @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 05:18:32.127] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 05:18:32.432] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 106.50 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 39ms (45%) │ 22ms (25%) │ 26ms (30%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 57ms (31%) │ 60ms (33%) │ 68ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 97ms (35%) │ 83ms (30%) │ 94ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 05:18:32.433] @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 0.53s 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 05:18:31.988] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:31.988] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:32.020] @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 05:18:32.020] @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 05:18:32.020] @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 05:18:32.021] @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 05:18:32.022] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 05:18:32.022] @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 05:18:32.024] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.029] @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 05:18:32.126] @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 05:18:32.126] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 05:18:32.127] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 05:18:32.127] @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 05:18:32.127] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 05:18:32.432] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 106.50 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 39ms (45%) │ 22ms (25%) │ 26ms (30%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 57ms (31%) │ 60ms (33%) │ 68ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 97ms (35%) │ 83ms (30%) │ 94ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 05:18:32.433] @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> 2. 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 05:18:31.988] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:31.988] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:32.018] @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 05:18:32.018] @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 05:18:32.018] @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 05:18:32.019] @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 05:18:32.019] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 05:18:32.020] @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 05:18:32.022] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @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 05:18:32.125] @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 05:18:32.125] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 05:18:32.125] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 05:18:32.125] @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 05:18:32.126] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 05:18:32.431] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 106.16 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 │ 40ms (48%) │ 20ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 58ms (31%) │ 60ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 99ms (36%) │ 81ms (30%) │ 92ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 05:18:32.432] @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 05:18:32.433] @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 0.53s 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 05:18:31.988] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:31.988] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:32.018] @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 05:18:32.018] @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 05:18:32.018] @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 05:18:32.019] @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 05:18:32.019] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 05:18:32.020] @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 05:18:32.022] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @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 05:18:32.125] @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 05:18:32.125] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 05:18:32.125] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 05:18:32.125] @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 05:18:32.126] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 05:18:32.431] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 106.16 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 │ 40ms (48%) │ 20ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 58ms (31%) │ 60ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 99ms (36%) │ 81ms (30%) │ 92ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 05:18:32.432] @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 05:18:32.433] @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> 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 05:18:31.990] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:31.990] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:32.019] @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 05:18:32.019] @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 05:18:32.019] @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 05:18:32.020] @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 05:18:32.021] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 05:18:32.022] @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 05:18:32.023] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @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 05:18:32.124] @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 05:18:32.124] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 05:18:32.124] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 05:18:32.125] @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 05:18:32.126] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 05:18:32.429] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 104.43 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 39ms (47%) │ 21ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 59ms (30%) │ 64ms (33%) │ 73ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 98ms (35%) │ 85ms (30%) │ 96ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 05:18:32.430] @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 05:18:32.431] @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 0.65s 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 05:18:31.990] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:31.990] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 05:18:32.019] @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 05:18:32.019] @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 05:18:32.019] @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 05:18:32.020] @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 05:18:32.021] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 05:18:32.022] @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 05:18:32.023] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 05:18:32.027] @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 05:18:32.124] @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 05:18:32.124] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 05:18:32.124] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 05:18:32.125] @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 05:18:32.126] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 05:18:32.429] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 104.43 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 39ms (47%) │ 21ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 59ms (30%) │ 64ms (33%) │ 73ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 98ms (35%) │ 85ms (30%) │ 96ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 05:18:32.430] @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 05:18:32.431] @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> ========================================= 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-ypJe6I >  Extracted 18 files to /build/nextest-archive-ypJe6I in 0.08s > ------------ >  Nextest run ID 50931996-a83d-4fbe-a663-15b57ec792be with nextest profile: ci_gammaloop >  Starting 5 tests across 1 binary >  FAIL [ 0.539s] (3/5) 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 0.53s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 05:18:31.988] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 05:18:31.988] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 05:18:32.020] @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 05:18:32.020] @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 05:18:32.020] @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 05:18:32.021] @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 05:18:32.022] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 05:18:32.022] @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 05:18:32.024] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 05:18:32.029] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 05:18:32.126] @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 05:18:32.126] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 05:18:32.127] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 05:18:32.127] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 05:18:32.127] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 05:18:32.432] @commands::generate INFO : > Integrand generation summary > peak RAM 106.50 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 39ms (45%) │ 22ms (25%) │ 26ms (30%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 57ms (31%) │ 60ms (33%) │ 68ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 97ms (35%) │ 83ms (30%) │ 94ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 05:18:32.433] @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 [ 0.539s] (4/5) 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 0.53s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 05:18:31.988] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 05:18:31.988] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 05:18:32.018] @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 05:18:32.018] @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 05:18:32.018] @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 05:18:32.019] @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 05:18:32.019] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 05:18:32.020] @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 05:18:32.022] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 05:18:32.125] @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 05:18:32.125] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 05:18:32.125] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 05:18:32.125] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 05:18:32.126] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 05:18:32.431] @commands::generate INFO : > Integrand generation summary > peak RAM 106.16 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 40ms (48%) │ 20ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 58ms (31%) │ 60ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 99ms (36%) │ 81ms (30%) │ 92ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 05:18:32.432] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 05:18:32.433] @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 [ 0.659s] (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 0.65s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 05:18:31.990] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 05:18:31.990] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 05:18:32.019] @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 05:18:32.019] @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 05:18:32.019] @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 05:18:32.020] @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 05:18:32.021] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 05:18:32.022] @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 05:18:32.023] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 05:18:32.124] @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 05:18:32.124] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 05:18:32.124] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 05:18:32.125] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 05:18:32.126] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 05:18:32.429] @commands::generate INFO : > Integrand generation summary > peak RAM 104.43 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 39ms (47%) │ 21ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 59ms (30%) │ 64ms (33%) │ 73ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 98ms (35%) │ 85ms (30%) │ 96ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 05:18:32.430] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 05:18:32.431] @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 [ 0.660s] 5 tests run: 2 passed, 3 failed, 0 skipped >  FAIL [ 0.539s] (3/5) 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 0.53s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 05:18:31.988] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 05:18:31.988] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 05:18:32.020] @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 05:18:32.020] @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 05:18:32.020] @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 05:18:32.021] @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 05:18:32.022] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 05:18:32.022] @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 05:18:32.024] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 05:18:32.029] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 05:18:32.126] @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 05:18:32.126] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 05:18:32.127] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 05:18:32.127] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 05:18:32.127] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 05:18:32.432] @commands::generate INFO : > Integrand generation summary > peak RAM 106.50 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 39ms (45%) │ 22ms (25%) │ 26ms (30%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 57ms (31%) │ 60ms (33%) │ 68ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 97ms (35%) │ 83ms (30%) │ 94ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 05:18:32.433] @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 [ 0.539s] (4/5) 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 0.53s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 05:18:31.988] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 05:18:31.988] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 05:18:32.018] @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 05:18:32.018] @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 05:18:32.018] @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 05:18:32.019] @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 05:18:32.019] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 05:18:32.020] @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 05:18:32.022] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 05:18:32.125] @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 05:18:32.125] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 05:18:32.125] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 05:18:32.125] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 05:18:32.126] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 05:18:32.431] @commands::generate INFO : > Integrand generation summary > peak RAM 106.16 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 40ms (48%) │ 20ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 58ms (31%) │ 60ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 99ms (36%) │ 81ms (30%) │ 92ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 05:18:32.432] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 05:18:32.433] @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 [ 0.659s] (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 0.65s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 05:18:31.990] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 05:18:31.990] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 05:18:32.019] @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 05:18:32.019] @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 05:18:32.019] @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 05:18:32.020] @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 05:18:32.021] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 05:18:32.022] @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 05:18:32.023] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 05:18:32.124] @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 05:18:32.124] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 05:18:32.124] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 05:18:32.125] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 05:18:32.126] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 05:18:32.429] @commands::generate INFO : > Integrand generation summary > peak RAM 104.43 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 39ms (47%) │ 21ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 59ms (30%) │ 64ms (33%) │ 73ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 98ms (35%) │ 85ms (30%) │ 96ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 05:18:32.430] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 05:18:32.431] @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_preserves_graph_grouping_and_incoming_pdgs > failure: test failure with exit code 101 > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 05:18:31.988] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 05:18:31.988] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 05:18:32.020] @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 05:18:32.020] @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 05:18:32.020] @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 05:18:32.021] @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 05:18:32.022] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 05:18:32.022] @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 05:18:32.024] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 05:18:32.029] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 05:18:32.126] @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 05:18:32.126] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 05:18:32.127] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 05:18:32.127] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 05:18:32.127] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 05:18:32.432] @commands::generate INFO : > Integrand generation summary > peak RAM 106.50 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 39ms (45%) │ 22ms (25%) │ 26ms (30%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 57ms (31%) │ 60ms (33%) │ 68ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 97ms (35%) │ 83ms (30%) │ 94ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 05:18:32.433] @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 0.53s > system-err > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 05:18:31.988] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 05:18:31.988] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 05:18:32.020] @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 05:18:32.020] @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 05:18:32.020] @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 05:18:32.021] @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 05:18:32.022] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 05:18:32.022] @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 05:18:32.024] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 05:18:32.028] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 05:18:32.029] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 05:18:32.126] @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 05:18:32.126] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 05:18:32.127] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 05:18:32.127] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 05:18:32.127] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 05:18:32.432] @commands::generate INFO : > Integrand generation summary > peak RAM 106.50 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 39ms (45%) │ 22ms (25%) │ 26ms (30%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 57ms (31%) │ 60ms (33%) │ 68ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 97ms (35%) │ 83ms (30%) │ 94ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 05:18:32.433] @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 > > 2. 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 05:18:31.988] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 05:18:31.988] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 05:18:32.018] @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 05:18:32.018] @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 05:18:32.018] @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 05:18:32.019] @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 05:18:32.019] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 05:18:32.020] @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 05:18:32.022] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 05:18:32.125] @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 05:18:32.125] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 05:18:32.125] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 05:18:32.125] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 05:18:32.126] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 05:18:32.431] @commands::generate INFO : > Integrand generation summary > peak RAM 106.16 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 40ms (48%) │ 20ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 58ms (31%) │ 60ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 99ms (36%) │ 81ms (30%) │ 92ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 05:18:32.432] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 05:18:32.433] @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 0.53s > system-err > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 05:18:31.988] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 05:18:31.988] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 05:18:32.018] @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 05:18:32.018] @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 05:18:32.018] @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 05:18:32.019] @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 05:18:32.019] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 05:18:32.020] @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 05:18:32.022] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 05:18:32.025] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 05:18:32.125] @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 05:18:32.125] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 05:18:32.125] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 05:18:32.125] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 05:18:32.126] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 05:18:32.431] @commands::generate INFO : > Integrand generation summary > peak RAM 106.16 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 40ms (48%) │ 20ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 58ms (31%) │ 60ms (32%) │ 68ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 99ms (36%) │ 81ms (30%) │ 92ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 05:18:32.432] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 05:18:32.433] @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 > > 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 05:18:31.990] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 05:18:31.990] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 05:18:32.019] @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 05:18:32.019] @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 05:18:32.019] @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 05:18:32.020] @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 05:18:32.021] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 05:18:32.022] @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 05:18:32.023] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 05:18:32.124] @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 05:18:32.124] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 05:18:32.124] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 05:18:32.125] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 05:18:32.126] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 05:18:32.429] @commands::generate INFO : > Integrand generation summary > peak RAM 104.43 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 39ms (47%) │ 21ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 59ms (30%) │ 64ms (33%) │ 73ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 98ms (35%) │ 85ms (30%) │ 96ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 05:18:32.430] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 05:18:32.431] @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 0.65s > system-err > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 05:18:31.990] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 05:18:31.990] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 05:18:32.019] @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 05:18:32.019] @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 05:18:32.019] @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 05:18:32.020] @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 05:18:32.021] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 05:18:32.022] @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 05:18:32.023] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 05:18:32.026] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 05:18:32.027] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 05:18:32.124] @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 05:18:32.124] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 05:18:32.124] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 05:18:32.125] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 05:18:32.126] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 05:18:32.429] @commands::generate INFO : > Integrand generation summary > peak RAM 104.43 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 39ms (47%) │ 21ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 59ms (30%) │ 64ms (33%) │ 73ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 98ms (35%) │ 85ms (30%) │ 96ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 05:18:32.430] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 05:18:32.431] @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 [0 built (1 failed), 0.0 Run failed.