$ /nix/store/9ypz3flqsrl5xl495mm8h645gadjsxi1-coreutils-9.11/bin/timeout --kill-after=15s 7200s /nix/store/23zk8sgzamrbmj1fday15szf7f2279s8-nix-2.34.7/bin/nix --extra-experimental-features nix-command --extra-experimental-features flakes flake clone git+https://github.com/alphal00p/gammaloop --dest /tmp/nix-ci-worker/stable-pwd/repo/ Cloning into '/tmp/nix-ci-worker/stable-pwd/repo'... remote: Enumerating objects: 77402 remote: Enumerating objects: 86604, done. remote: Counting objects: 0% (1/9202) remote: Counting objects: 1% (93/9202) remote: Counting objects: 2% (185/9202) remote: Counting objects: 3% (277/9202) remote: Counting objects: 4% (369/9202) remote: Counting objects: 5% (461/9202) remote: Counting objects: 6% (553/9202) remote: Counting objects: 7% (645/9202) remote: Counting objects: 8% (737/9202) remote: Counting objects: 9% (829/9202) remote: Counting objects: 10% (921/9202) remote: Counting objects: 11% (1013/9202) remote: Counting objects: 12% (1105/9202) remote: Counting objects: 13% (1197/9202) remote: Counting objects: 14% (1289/9202) remote: Counting objects: 15% (1381/9202) remote: Counting objects: 16% (1473/9202) remote: Counting objects: 17% (1565/9202) remote: Counting objects: 18% (1657/9202) remote: Counting objects: 19% (1749/9202) remote: Counting objects: 20% (1841/9202) remote: Counting objects: 21% (1933/9202) remote: Counting objects: 22% (2025/9202) remote: Counting objects: 23% (2117/9202) remote: Counting objects: 24% (2209/9202) remote: Counting objects: 25% (2301/9202) remote: Counting objects: 26% (2393/9202) remote: Counting objects: 27% (2485/9202) remote: Counting objects: 28% (2577/9202) remote: Counting objects: 29% (2669/9202) remote: Counting objects: 30% (2761/9202) remote: Counting objects: 31% (2853/9202) remote: Counting objects: 32% (2945/9202) remote: Counting objects: 33% (3037/9202) remote: Counting objects: 34% (3129/9202) remote: Counting objects: 35% (3221/9202) remote: Counting objects: 36% (3313/9202) remote: Counting objects: 37% (3405/9202) remote: Counting objects: 38% (3497/9202) remote: Counting objects: 39% (3589/9202) remote: Counting objects: 40% (3681/9202) remote: Counting objects: 41% (3773/9202) remote: Counting objects: 42% (3865/9202) remote: Counting objects: 43% (3957/9202) remote: Counting objects: 44% (4049/9202) remote: Counting objects: 45% (4141/9202) remote: Counting objects: 46% (4233/9202) remote: Counting objects: 47% (4325/9202) remote: Counting objects: 48% (4417/9202) remote: Counting objects: 49% (4509/9202) remote: Counting objects: 50% (4601/9202) remote: Counting objects: 51% (4694/9202) remote: Counting objects: 52% (4786/9202) remote: Counting objects: 53% (4878/9202) remote: Counting objects: 54% (4970/9202) remote: Counting objects: 55% (5062/9202) remote: Counting objects: 56% (5154/9202) remote: Counting objects: 57% (5246/9202) remote: Counting objects: 58% (5338/9202) remote: Counting objects: 59% (5430/9202) remote: Counting objects: 60% (5522/9202) remote: Counting objects: 61% (5614/9202) remote: Counting objects: 62% (5706/9202) remote: Counting objects: 63% (5798/9202) remote: Counting objects: 64% (5890/9202) remote: Counting objects: 65% (5982/9202) remote: Counting objects: 66% (6074/9202) remote: Counting objects: 67% (6166/9202) remote: Counting objects: 68% (6258/9202) remote: Counting objects: 69% (6350/9202) remote: Counting objects: 70% (6442/9202) remote: Counting objects: 71% (6534/9202) remote: Counting objects: 72% (6626/9202) remote: Counting objects: 73% (6718/9202) remote: Counting objects: 74% (6810/9202) remote: Counting objects: 75% (6902/9202) remote: Counting objects: 76% (6994/9202) remote: Counting objects: 77% (7086/9202) remote: Counting objects: 78% (7178/9202) remote: Counting objects: 79% (7270/9202) remote: Counting objects: 80% (7362/9202) remote: Counting objects: 81% (7454/9202) remote: Counting objects: 82% (7546/9202) remote: Counting objects: 83% (7638/9202) remote: Counting objects: 84% (7730/9202) remote: Counting objects: 85% (7822/9202) remote: Counting objects: 86% (7914/9202) remote: Counting objects: 87% (8006/9202) remote: Counting objects: 88% (8098/9202) remote: Counting objects: 89% (8190/9202) remote: Counting objects: 90% (8282/9202) remote: Counting objects: 91% (8374/9202) remote: Counting objects: 92% (8466/9202) remote: Counting objects: 93% (8558/9202) remote: Counting objects: 94% (8650/9202) remote: Counting objects: 95% (8742/9202) remote: Counting objects: 96% (8834/9202) remote: Counting objects: 97% (8926/9202) remote: Counting objects: 98% (9018/9202) remote: Counting objects: 99% (9110/9202) remote: Counting objects: 100% (9202/9202) remote: Counting objects: 100% (9202/9202), done. remote: Compressing objects: 0% (1/2147) remote: Compressing objects: 1% (22/2147) remote: Compressing objects: 2% (43/2147) remote: Compressing objects: 3% (65/2147) remote: Compressing objects: 4% (86/2147) remote: Compressing objects: 5% (108/2147) remote: Compressing objects: 6% (129/2147) remote: Compressing objects: 7% (151/2147) remote: Compressing objects: 8% (172/2147) remote: Compressing objects: 9% (194/2147) remote: Compressing objects: 10% (215/2147) remote: Compressing objects: 11% (237/2147) remote: Compressing objects: 12% (258/2147) remote: Compressing objects: 12% (269/2147) remote: Compressing objects: 13% (280/2147) remote: Compressing objects: 14% (301/2147) remote: Compressing objects: 15% (323/2147) remote: Compressing objects: 16% (344/2147) remote: Compressing objects: 17% (365/2147) remote: Compressing objects: 18% (387/2147) remote: Compressing objects: 19% (408/2147) remote: Compressing objects: 20% (430/2147) remote: Compressing objects: 21% (451/2147) remote: Compressing objects: 21% (469/2147) remote: Compressing objects: 22% (473/2147) remote: Compressing objects: 23% (494/2147) remote: Compressing objects: 24% (516/2147) remote: Compressing objects: 25% (537/2147) remote: Compressing objects: 26% (559/2147) remote: Compressing objects: 27% (580/2147) remote: Compressing objects: 28% (602/2147) remote: Compressing objects: 29% (623/2147) remote: Compressing objects: 30% (645/2147) remote: Compressing objects: 31% (666/2147) remote: Compressing objects: 32% (688/2147) remote: Compressing objects: 33% (709/2147) remote: Compressing objects: 34% (730/2147) remote: Compressing objects: 35% (752/2147) remote: Compressing objects: 36% (773/2147) remote: Compressing objects: 37% (795/2147) remote: Compressing objects: 38% (816/2147) remote: Compressing objects: 39% (838/2147) remote: Compressing objects: 40% (859/2147) remote: Compressing objects: 41% (881/2147) remote: Compressing objects: 42% (902/2147) remote: Compressing objects: 43% (924/2147) remote: Compressing objects: 44% (945/2147) remote: Compressing objects: 45% (967/2147) remote: Compressing objects: 46% (988/2147) remote: Compressing objects: 47% (1010/2147) remote: Compressing objects: 48% (1031/2147) remote: Compressing objects: 49% (1053/2147) remote: Compressing objects: 50% (1074/2147) remote: Compressing objects: 51% (1095/2147) remote: Compressing objects: 52% (1117/2147) remote: Compressing objects: 53% (1138/2147) remote: Compressing objects: 54% (1160/2147) remote: Compressing objects: 55% (1181/2147) remote: Compressing objects: 56% (1203/2147) remote: Compressing objects: 57% (1224/2147) remote: Compressing objects: 58% (1246/2147) remote: Compressing objects: 59% (1267/2147) remote: Compressing objects: 60% (1289/2147) remote: Compressing objects: 61% (1310/2147) remote: Compressing objects: 62% (1332/2147) remote: Compressing objects: 63% (1353/2147) remote: Compressing objects: 64% (1375/2147) remote: Compressing objects: 65% (1396/2147) remote: Compressing objects: 66% (1418/2147) remote: Compressing objects: 67% (1439/2147) remote: Compressing objects: 68% (1460/2147) remote: Compressing objects: 69% (1482/2147) remote: Compressing objects: 70% (1503/2147) remote: Compressing objects: 71% (1525/2147) remote: Compressing objects: 72% (1546/2147) remote: Compressing objects: 73% (1568/2147) remote: Compressing objects: 74% (1589/2147) remote: Compressing objects: 75% (1611/2147) remote: Compressing objects: 76% (1632/2147) remote: Compressing objects: 77% (1654/2147) remote: Compressing objects: 78% (1675/2147) remote: Compressing objects: 79% (1697/2147) remote: Compressing objects: 80% (1718/2147) remote: Compressing objects: 81% (1740/2147) remote: Compressing objects: 82% (1761/2147) remote: Compressing objects: 83% (1783/2147) remote: Compressing objects: 84% (1804/2147) remote: Compressing objects: 85% (1825/2147) remote: Compressing objects: 86% (1847/2147) remote: Compressing objects: 87% (1868/2147) remote: Compressing objects: 88% (1890/2147) remote: Compressing objects: 89% (1911/2147) remote: Compressing objects: 90% (1933/2147) remote: Compressing objects: 91% (1954/2147) remote: Compressing objects: 92% (1976/2147) remote: Compressing objects: 93% (1997/2147) remote: Compressing objects: 94% (2019/2147) remote: Compressing objects: 95% (2040/2147) remote: Compressing objects: 96% (2062/2147) remote: Compressing objects: 97% (2083/2147) remote: Compressing objects: 98% (2105/2147) remote: Compressing objects: 99% (2126/2147) remote: Compressing objects: 100% (2147/2147) remote: Compressing objects: 100% (2147/2147), done. Receiving objects: 0% (1/86604) Receiving objects: 1% (867/86604) Receiving objects: 2% (1733/86604) Receiving objects: 3% (2599/86604) Receiving objects: 4% (3465/86604) Receiving objects: 5% (4331/86604) Receiving objects: 6% (5197/86604) Receiving objects: 7% (6063/86604) Receiving objects: 8% (6929/86604) Receiving objects: 9% (7795/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 10% (8661/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 11% (9527/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 12% (10393/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 13% (11259/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 14% (12125/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 15% (12991/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 16% (13857/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 17% (14723/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 18% (15589/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 19% (16455/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 20% (17321/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 21% (18187/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 22% (19053/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 23% (19919/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 24% (20785/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 25% (21651/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 26% (22518/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 27% (23384/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 28% (24250/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 29% (25116/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 30% (25982/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 31% (26848/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 32% (27714/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 33% (28580/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 34% (29446/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 35% (30312/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 36% (31178/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 37% (32044/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 38% (32910/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 39% (33776/86604), 15.68 MiB | 31.33 MiB/s Receiving objects: 39% (33913/86604), 32.65 MiB | 32.45 MiB/s Receiving objects: 40% (34642/86604), 32.65 MiB | 32.45 MiB/s Receiving objects: 41% (35508/86604), 32.65 MiB | 32.45 MiB/s Receiving objects: 42% (36374/86604), 32.65 MiB | 32.45 MiB/s Receiving objects: 43% (37240/86604), 32.65 MiB | 32.45 MiB/s Receiving objects: 44% (38106/86604), 32.65 MiB | 32.45 MiB/s Receiving objects: 45% (38972/86604), 32.65 MiB | 32.45 MiB/s Receiving objects: 46% (39838/86604), 32.65 MiB | 32.45 MiB/s Receiving objects: 47% (40704/86604), 47.82 MiB | 31.67 MiB/s Receiving objects: 48% (41570/86604), 47.82 MiB | 31.67 MiB/s Receiving objects: 49% (42436/86604), 47.82 MiB | 31.67 MiB/s Receiving objects: 50% (43302/86604), 47.82 MiB | 31.67 MiB/s Receiving objects: 51% (44169/86604), 47.82 MiB | 31.67 MiB/s Receiving objects: 52% (45035/86604), 47.82 MiB | 31.67 MiB/s Receiving objects: 53% (45901/86604), 47.82 MiB | 31.67 MiB/s Receiving objects: 54% (46767/86604), 47.82 MiB | 31.67 MiB/s Receiving objects: 55% (47633/86604), 47.82 MiB | 31.67 MiB/s Receiving objects: 56% (48499/86604), 47.82 MiB | 31.67 MiB/s Receiving objects: 56% (48725/86604), 65.31 MiB | 32.49 MiB/s Receiving objects: 57% (49365/86604), 65.31 MiB | 32.49 MiB/s Receiving objects: 58% (50231/86604), 65.31 MiB | 32.49 MiB/s Receiving objects: 59% (51097/86604), 65.31 MiB | 32.49 MiB/s Receiving objects: 60% (51963/86604), 65.31 MiB | 32.49 MiB/s Receiving objects: 61% (52829/86604), 65.31 MiB | 32.49 MiB/s Receiving objects: 62% (53695/86604), 65.31 MiB | 32.49 MiB/s Receiving objects: 63% (54561/86604), 65.31 MiB | 32.49 MiB/s Receiving objects: 64% (55427/86604), 65.31 MiB | 32.49 MiB/s Receiving objects: 65% (56293/86604), 65.31 MiB | 32.49 MiB/s Receiving objects: 66% (57159/86604), 81.61 MiB | 32.37 MiB/s Receiving objects: 66% (57330/86604), 97.43 MiB | 32.21 MiB/s Receiving objects: 67% (58025/86604), 97.43 MiB | 32.21 MiB/s Receiving objects: 68% (58891/86604), 97.43 MiB | 32.21 MiB/s Receiving objects: 69% (59757/86604), 97.43 MiB | 32.21 MiB/s Receiving objects: 70% (60623/86604), 97.43 MiB | 32.21 MiB/s Receiving objects: 71% (61489/86604), 97.43 MiB | 32.21 MiB/s Receiving objects: 72% (62355/86604), 97.43 MiB | 32.21 MiB/s Receiving objects: 73% (63221/86604), 115.14 MiB | 32.67 MiB/s Receiving objects: 74% (64087/86604), 115.14 MiB | 32.67 MiB/s Receiving objects: 74% (64538/86604), 115.14 MiB | 32.67 MiB/s Receiving objects: 75% (64953/86604), 131.34 MiB | 32.54 MiB/s Receiving objects: 76% (65820/86604), 131.34 MiB | 32.54 MiB/s Receiving objects: 77% (66686/86604), 131.34 MiB | 32.54 MiB/s Receiving objects: 78% (67552/86604), 131.34 MiB | 32.54 MiB/s Receiving objects: 79% (68418/86604), 131.34 MiB | 32.54 MiB/s Receiving objects: 80% (69284/86604), 131.34 MiB | 32.54 MiB/s Receiving objects: 81% (70150/86604), 131.34 MiB | 32.54 MiB/s Receiving objects: 82% (71016/86604), 131.34 MiB | 32.54 MiB/s Receiving objects: 83% (71882/86604), 131.34 MiB | 32.54 MiB/s Receiving objects: 84% (72748/86604), 131.34 MiB | 32.54 MiB/s Receiving objects: 85% (73614/86604), 131.34 MiB | 32.54 MiB/s Receiving objects: 86% (74480/86604), 131.34 MiB | 32.54 MiB/s Receiving objects: 87% (75346/86604), 147.57 MiB | 32.49 MiB/s Receiving objects: 88% (76212/86604), 147.57 MiB | 32.49 MiB/s Receiving objects: 89% (77078/86604), 147.57 MiB | 32.49 MiB/s Receiving objects: 90% (77944/86604), 147.57 MiB | 32.49 MiB/s Receiving objects: 91% (78810/86604), 147.57 MiB | 32.49 MiB/s Receiving objects: 92% (79676/86604), 147.57 MiB | 32.49 MiB/s Receiving objects: 93% (80542/86604), 147.57 MiB | 32.49 MiB/s Receiving objects: 94% (81408/86604), 147.57 MiB | 32.49 MiB/s Receiving objects: 95% (82274/86604), 147.57 MiB | 32.49 MiB/s Receiving objects: 96% (83140/86604), 147.57 MiB | 32.49 MiB/s Receiving objects: 97% (84006/86604), 147.57 MiB | 32.49 MiB/s Receiving objects: 98% (84872/86604), 147.57 MiB | 32.49 MiB/s Receiving objects: 99% (85738/86604), 147.57 MiB | 32.49 MiB/s remote: Total 86604 (delta 7941), reused 7228 (delta 7049), pack-reused 77402 (from 3) Receiving objects: 100% (86604/86604), 147.57 MiB | 32.49 MiB/s Receiving objects: 100% (86604/86604), 157.26 MiB | 32.68 MiB/s, done. Resolving deltas: 0% (0/58806) Resolving deltas: 1% (590/58806) Resolving deltas: 2% (1177/58806) Resolving deltas: 3% (1765/58806) Resolving deltas: 4% (2353/58806) Resolving deltas: 5% (2941/58806) Resolving deltas: 6% (3530/58806) Resolving deltas: 7% (4117/58806) Resolving deltas: 8% (4705/58806) Resolving deltas: 9% (5293/58806) Resolving deltas: 10% (5881/58806) Resolving deltas: 11% (6469/58806) Resolving deltas: 12% (7057/58806) Resolving deltas: 13% (7645/58806) Resolving deltas: 14% (8234/58806) Resolving deltas: 15% (8821/58806) Resolving deltas: 16% (9409/58806) Resolving deltas: 17% (10001/58806) Resolving deltas: 18% (10586/58806) Resolving deltas: 19% (11174/58806) Resolving deltas: 20% (11762/58806) Resolving deltas: 21% (12350/58806) Resolving deltas: 22% (12939/58806) Resolving deltas: 23% (13526/58806) Resolving deltas: 24% (14114/58806) Resolving deltas: 25% (14704/58806) Resolving deltas: 26% (15290/58806) Resolving deltas: 27% (15878/58806) Resolving deltas: 28% (16466/58806) Resolving deltas: 29% (17054/58806) Resolving deltas: 30% (17642/58806) Resolving deltas: 31% (18230/58806) Resolving deltas: 32% (18818/58806) Resolving deltas: 33% (19406/58806) Resolving deltas: 34% (19995/58806) Resolving deltas: 35% (20583/58806) Resolving deltas: 36% (21171/58806) Resolving deltas: 37% (21759/58806) Resolving deltas: 38% (22347/58806) Resolving deltas: 39% (22935/58806) Resolving deltas: 40% (23523/58806) Resolving deltas: 41% (24111/58806) Resolving deltas: 42% (24699/58806) Resolving deltas: 43% (25287/58806) Resolving deltas: 44% (25877/58806) Resolving deltas: 45% (26463/58806) Resolving deltas: 46% (27052/58806) Resolving deltas: 47% (27641/58806) Resolving deltas: 48% (28227/58806) Resolving deltas: 49% (28817/58806) Resolving deltas: 50% (29403/58806) Resolving deltas: 51% (29992/58806) Resolving deltas: 52% (30580/58806) Resolving deltas: 53% (31168/58806) Resolving deltas: 54% (31756/58806) Resolving deltas: 55% (32344/58806) Resolving deltas: 56% (32932/58806) Resolving deltas: 57% (33520/58806) Resolving deltas: 58% (34108/58806) Resolving deltas: 59% (34696/58806) Resolving deltas: 60% (35284/58806) Resolving deltas: 61% (35873/58806) Resolving deltas: 62% (36460/58806) Resolving deltas: 63% (37048/58806) Resolving deltas: 64% (37636/58806) Resolving deltas: 65% (38224/58806) Resolving deltas: 66% (38812/58806) Resolving deltas: 67% (39401/58806) Resolving deltas: 68% (39990/58806) Resolving deltas: 69% (40577/58806) Resolving deltas: 70% (41168/58806) Resolving deltas: 71% (41753/58806) Resolving deltas: 72% (42344/58806) Resolving deltas: 73% (42929/58806) Resolving deltas: 74% (43518/58806) Resolving deltas: 75% (44105/58806) Resolving deltas: 76% (44693/58806) Resolving deltas: 77% (45281/58806) Resolving deltas: 78% (45869/58806) Resolving deltas: 79% (46457/58806) Resolving deltas: 80% (47045/58806) Resolving deltas: 81% (47633/58806) Resolving deltas: 82% (48221/58806) Resolving deltas: 83% (48809/58806) Resolving deltas: 84% (49398/58806) Resolving deltas: 85% (49986/58806) Resolving deltas: 86% (50574/58806) Resolving deltas: 87% (51162/58806) Resolving deltas: 88% (51751/58806) Resolving deltas: 89% (52338/58806) Resolving deltas: 90% (52927/58806) Resolving deltas: 91% (53514/58806) Resolving deltas: 92% (54102/58806) Resolving deltas: 93% (54694/58806) Resolving deltas: 94% (55278/58806) Resolving deltas: 95% (55866/58806) Resolving deltas: 96% (56454/58806) Resolving deltas: 97% (57042/58806) Resolving deltas: 98% (57630/58806) Resolving deltas: 99% (58218/58806) Resolving deltas: 100% (58806/58806) Resolving deltas: 100% (58806/58806), done. Fetching commit f446d6ce5dbe9ffc5da4fdc84c8dd7da02cf2df5 for advanced_sampling ... $ /nix/store/bcnisk3ydfgv26v2gw3zlky24g00yww2-git-2.54.0/bin/git fetch origin f446d6ce5dbe9ffc5da4fdc84c8dd7da02cf2df5 From https://github.com/alphal00p/gammaloop * branch f446d6ce5dbe9ffc5da4fdc84c8dd7da02cf2df5 -> 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 f446d6ce5dbe9ffc5da4fdc84c8dd7da02cf2df5 HEAD is now at f446d6ce5 retain one sampling draw across physical precision rescue $ /nix/store/9ypz3flqsrl5xl495mm8h645gadjsxi1-coreutils-9.11/bin/timeout --kill-after=15s 7200s /nix/store/23zk8sgzamrbmj1fday15szf7f2279s8-nix-2.34.7/bin/nix --extra-experimental-features nix-command --extra-experimental-features flakes --log-format internal-json run .#packages.x86_64-linux.nix-ci-check-gammaloop-nextest-python-api --print-build-logs  Downloading cached nix-ci-check-gammaloop-nextest-python-api from https://cache.nix-ci.com Downloaded cached nix-ci-check-gammaloop-nextest-python-api (1104 B) in 4ms Progress: 0 of 1 built, 1 of 1 downloaded from cache evaluating derivation 'g copying '/nix/store/bv08 evaluating derivation 'g     copying '/nix/store/bv08 evaluating derivation 'g copying '/nix/store/bv08 evaluating derivation 'g copying '/nix/store/bv08 evaluating derivation 'g copying '/nix/store/bv08 evaluating derivation 'g copying '/nix/store/bv08 evaluating derivation 'g copying '/nix/store/bv08 evaluating derivation 'g copying '/nix/store/bv08 evaluating derivation 'g copying '/nix/store/bv08 evaluating derivation 'g copying '/nix/store/bv08 evaluating derivation 'g copying '/nix/store/bv08 evaluating derivation 'g copying '/nix/store/bv08 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-wMuDUf gammaloop-nextest-python-api>  Extracted 18 files to /build/nextest-archive-wMuDUf in 0.06s gammaloop-nextest-python-api> ------------ gammaloop-nextest-python-api>  Nextest run ID f6430832-ff28-4347-8963-0ec6cacd5506 with nextest profile: ci_gammaloop gammaloop-nextest-python-api>  Starting 5 tests across 1 binary gammaloop-nextest-python-api>  FAIL [ 0.601s] (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 0.60s 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 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.683] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 03:33:59.684] @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 03:33:59.686] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.691] @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 03:33:59.794] @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 03:33:59.794] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 03:33:59.795] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 03:33:59.795] @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 03:33:59.796] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 03:34:00.098] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 95.38 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 │ 41ms (48%) │ 20ms (24%) │ 24ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 59ms (31%) │ 59ms (32%) │ 70ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 101ms (37%) │ 80ms (29%) │ 94ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 03:34:00.099] @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 [ 0.601s] (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 0.60s 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 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.684] @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 03:33:59.684] @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 03:33:59.684] @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 03:33:59.685] @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 03:33:59.686] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 03:33:59.687] @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 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.694] @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 03:33:59.792] @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 03:33:59.792] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 03:33:59.792] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 03:33:59.792] @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 03:33:59.793] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 03:34:00.096] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 96.34 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 36ms (45%) │ 20ms (26%) │ 23ms (30%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 58ms (31%) │ 59ms (32%) │ 69ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 94ms (35%) │ 79ms (30%) │ 93ms (35%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 03:34:00.096] @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 03:34:00.097] @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 [ 0.714s] (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 0.71s 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 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.683] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 03:33:59.684] @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 03:33:59.686] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.691] @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 03:33:59.789] @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 03:33:59.790] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 03:33:59.790] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 03:33:59.790] @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 03:33:59.791] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 03:34:00.094] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 95.46 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 38ms (47%) │ 20ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 56ms (30%) │ 61ms (33%) │ 69ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 95ms (35%) │ 81ms (30%) │ 93ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 03:34:00.095] @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 03:34:00.096] @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 [ 0.716s] 5 tests run: 2 passed, 3 failed, 0 skipped gammaloop-nextest-python-api>  FAIL [ 0.601s] (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 0.60s 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 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.683] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 03:33:59.684] @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 03:33:59.686] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.691] @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 03:33:59.794] @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 03:33:59.794] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 03:33:59.795] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 03:33:59.795] @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 03:33:59.796] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 03:34:00.098] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 95.38 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 │ 41ms (48%) │ 20ms (24%) │ 24ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 59ms (31%) │ 59ms (32%) │ 70ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 101ms (37%) │ 80ms (29%) │ 94ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 03:34:00.099] @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 [ 0.601s] (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 0.60s 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 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.684] @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 03:33:59.684] @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 03:33:59.684] @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 03:33:59.685] @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 03:33:59.686] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 03:33:59.687] @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 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.694] @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 03:33:59.792] @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 03:33:59.792] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 03:33:59.792] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 03:33:59.792] @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 03:33:59.793] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 03:34:00.096] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 96.34 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 36ms (45%) │ 20ms (26%) │ 23ms (30%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 58ms (31%) │ 59ms (32%) │ 69ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 94ms (35%) │ 79ms (30%) │ 93ms (35%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 03:34:00.096] @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 03:34:00.097] @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 [ 0.714s] (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 0.71s 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 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.683] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 03:33:59.684] @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 03:33:59.686] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.691] @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 03:33:59.789] @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 03:33:59.790] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 03:33:59.790] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 03:33:59.790] @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 03:33:59.791] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 03:34:00.094] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 95.46 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 38ms (47%) │ 20ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 56ms (30%) │ 61ms (33%) │ 69ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 95ms (35%) │ 81ms (30%) │ 93ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 03:34:00.095] @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 03:34:00.096] @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 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.683] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 03:33:59.684] @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 03:33:59.686] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.691] @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 03:33:59.794] @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 03:33:59.794] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 03:33:59.795] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 03:33:59.795] @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 03:33:59.796] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 03:34:00.098] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 95.38 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 │ 41ms (48%) │ 20ms (24%) │ 24ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 59ms (31%) │ 59ms (32%) │ 70ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 101ms (37%) │ 80ms (29%) │ 94ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 03:34:00.099] @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 0.60s 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 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.683] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 03:33:59.684] @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 03:33:59.686] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.691] @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 03:33:59.794] @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 03:33:59.794] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 03:33:59.795] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 03:33:59.795] @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 03:33:59.796] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 03:34:00.098] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 95.38 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 │ 41ms (48%) │ 20ms (24%) │ 24ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 59ms (31%) │ 59ms (32%) │ 70ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 101ms (37%) │ 80ms (29%) │ 94ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 03:34:00.099] @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 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.684] @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 03:33:59.684] @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 03:33:59.684] @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 03:33:59.685] @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 03:33:59.686] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 03:33:59.687] @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 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.694] @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 03:33:59.792] @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 03:33:59.792] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 03:33:59.792] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 03:33:59.792] @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 03:33:59.793] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 03:34:00.096] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 96.34 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 36ms (45%) │ 20ms (26%) │ 23ms (30%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 58ms (31%) │ 59ms (32%) │ 69ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 94ms (35%) │ 79ms (30%) │ 93ms (35%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 03:34:00.096] @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 03:34:00.097] @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 0.60s 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 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.684] @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 03:33:59.684] @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 03:33:59.684] @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 03:33:59.685] @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 03:33:59.686] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 03:33:59.687] @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 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.694] @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 03:33:59.792] @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 03:33:59.792] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 03:33:59.792] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 03:33:59.792] @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 03:33:59.793] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 03:34:00.096] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 96.34 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 36ms (45%) │ 20ms (26%) │ 23ms (30%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 58ms (31%) │ 59ms (32%) │ 69ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 94ms (35%) │ 79ms (30%) │ 93ms (35%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 03:34:00.096] @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 03:34:00.097] @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 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.683] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 03:33:59.684] @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 03:33:59.686] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.691] @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 03:33:59.789] @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 03:33:59.790] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 03:33:59.790] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 03:33:59.790] @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 03:33:59.791] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 03:34:00.094] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 95.46 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 38ms (47%) │ 20ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 56ms (30%) │ 61ms (33%) │ 69ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 95ms (35%) │ 81ms (30%) │ 93ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 03:34:00.095] @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 03:34:00.096] @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 0.71s 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 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default gammaloop-nextest-python-api>  [2026-09-14 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.683] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true gammaloop-nextest-python-api>  [2026-09-14 03:33:59.684] @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 03:33:59.686] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 gammaloop-nextest-python-api>  [2026-09-14 03:33:59.691] @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 03:33:59.789] @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 03:33:59.790] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) gammaloop-nextest-python-api>  [2026-09-14 03:33:59.790] @commands::generate INFO : Generated cross-section 2 graphs. gammaloop-nextest-python-api>  [2026-09-14 03:33:59.790] @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 03:33:59.791] @gammaloop_api::se... INFO : Running command generate gammaloop-nextest-python-api>  [2026-09-14 03:34:00.094] @commands::generate INFO : gammaloop-nextest-python-api>  Integrand generation summary gammaloop-nextest-python-api>  peak RAM 95.46 MiB | cores 1 gammaloop-nextest-python-api>  ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ gammaloop-nextest-python-api>  │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ default │ GL0 │ 3 │ 38ms (47%) │ 20ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  │ default │ GL2 │ 5 │ 56ms (30%) │ 61ms (33%) │ 69ms (37%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ gammaloop-nextest-python-api>  │ Total │ │ 8 │ 95ms (35%) │ 81ms (30%) │ 93ms (34%) │ 0ms (0.00%) │ gammaloop-nextest-python-api>  ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ gammaloop-nextest-python-api>  [2026-09-14 03:34:00.095] @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 03:34:00.096] @gammaloop_api::se... INFO : Running command set process kv general.generate_events=true gammaloop-nextest-python-api>  The application panicked (crashed). gammaloop-nextest-python-api>  Message: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  Location: crates/gammalooprs/src/subtraction/lu_counterterm.rs:1485 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ gammaloop-nextest-python-api>  1: ::panic_report gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  2: ::into_panic_hook::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  3: std[bcb96dfbba0ab899]::panicking::panic_with_hook gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  4: std[bcb96dfbba0ab899]::panicking::panic_handler::{closure#0} gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  5: std[bcb96dfbba0ab899]::sys::backtrace::__rust_end_short_backtrace:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  6: __rustc[6c289b9f9c454d21]::rust_begin_unwind gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  7: core[940e698046960fd5]::panicking::panic_fmt gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  8: core[940e698046960fd5]::panicking::panic_bounds_check gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  9: >, ::evaluate::{closure#4}> as core[940e698046960fd5]::iter::traits::iterator::Iterator>::fold::<(), core[940e698046960fd5]::iter::traits::iterator::Iterator::for_each::call<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), )>>::extend_trusted>, ::evaluate::{closure#4}>>::{closure#0}>::{closure#0}> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  10: )> as alloc[2ea6bcb46fca0c42]::vec::spec_from_iter::SpecFromIter<(gammalooprs[b9254693d317978d]::processes::cross_section::CutGroupId, &gammalooprs[b9254693d317978d]::momentum::sample::MomentumSample), core[940e698046960fd5]::iter::adapters::map::Map>, ::evaluate::{closure#4}>>>::from_iter gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  11: ::evaluate:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  12: gammalooprs[b9254693d317978d]::integrands::process::evaluate_from_source_precise:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  13: ::evaluate_samples_raw gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  14: ::run gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  15: ::evaluate_samples gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  16: ::__pymethod_evaluate_samples__ gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  17: pyo3[4efe0e4b266717a9]::impl_::trampoline::trampoline:: gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  18: pyo3[4efe0e4b266717a9]::impl_::trampoline::cfunction_with_keywords::< as pyo3[4efe0e4b266717a9]::impl_::pyclass::PyMethods>::py_methods::ITEMS::Def> gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  19: method_vectorcall_VARARGS_KEYWORDS gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  20: _PyEval_EvalFrameDefault.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  21: PyEval_EvalCode.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  22: run_eval_code_obj gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  23: run_mod gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  24: Py_RunMain.localalias gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  25: __libc_start_call_main gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  26: __libc_start_main_alias_2 gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  27: _start gammaloop-nextest-python-api>  at : gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering. gammaloop-nextest-python-api>  Run with RUST_BACKTRACE=full to include source snippets. gammaloop-nextest-python-api>  Traceback (most recent call last): gammaloop-nextest-python-api>  File "", line 85, in  gammaloop-nextest-python-api>  batch = summarize_batch_result(api.evaluate_samples(points)) gammaloop-nextest-python-api>  ~~~~~~~~~~~~~~~~~~~~^^^^^^^^ gammaloop-nextest-python-api>  pyo3_runtime.PanicException: index out of bounds: the len is 0 but the index is 0 gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  gammaloop-nextest-python-api>  Location: gammaloop-nextest-python-api>  tests/tests/test_python_api.rs:156:20 gammaloop-nextest-python-api> ========================================= [0 built (1 failed), 0.0 error: Cannot build '/nix/store/pjzj80k3rmb55mn2s1vlwi2xqcssp4v1-gammaloop-nextest-python-api.drv'. Reason: builder failed with exit code 100. Output paths: /nix/store/5hhzsks0dj9rdiiav5ihk6wj14p03gxg-gammaloop-nextest-python-api Last 1545 log lines: >  Extracting 1 binary, 1 build script output directory, and 3 linked paths to /build/nextest-archive-wMuDUf >  Extracted 18 files to /build/nextest-archive-wMuDUf in 0.06s > ------------ >  Nextest run ID f6430832-ff28-4347-8963-0ec6cacd5506 with nextest profile: ci_gammaloop >  Starting 5 tests across 1 binary >  FAIL [ 0.601s] (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 0.60s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.683] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 03:33:59.684] @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 03:33:59.686] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 03:33:59.691] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 03:33:59.794] @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 03:33:59.794] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 03:33:59.795] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 03:33:59.795] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 03:33:59.796] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 03:34:00.098] @commands::generate INFO : > Integrand generation summary > peak RAM 95.38 MiB | cores 1 > ╭───────────┬───────┬─────────┬─────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 41ms (48%) │ 20ms (24%) │ 24ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 59ms (31%) │ 59ms (32%) │ 70ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 101ms (37%) │ 80ms (29%) │ 94ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 03:34:00.099] @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 [ 0.601s] (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 0.60s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 03:33:59.684] @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 03:33:59.684] @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 03:33:59.684] @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 03:33:59.685] @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 03:33:59.686] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 03:33:59.687] @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 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 03:33:59.792] @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 03:33:59.792] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 03:33:59.792] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 03:33:59.792] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 03:33:59.793] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 03:34:00.096] @commands::generate INFO : > Integrand generation summary > peak RAM 96.34 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 36ms (45%) │ 20ms (26%) │ 23ms (30%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 58ms (31%) │ 59ms (32%) │ 69ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 94ms (35%) │ 79ms (30%) │ 93ms (35%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 03:34:00.096] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 03:34:00.097] @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 [ 0.714s] (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 0.71s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.683] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 03:33:59.684] @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 03:33:59.686] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 03:33:59.691] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 03:33:59.789] @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 03:33:59.790] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 03:33:59.790] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 03:33:59.790] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 03:33:59.791] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 03:34:00.094] @commands::generate INFO : > Integrand generation summary > peak RAM 95.46 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 38ms (47%) │ 20ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 56ms (30%) │ 61ms (33%) │ 69ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 95ms (35%) │ 81ms (30%) │ 93ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 03:34:00.095] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 03:34:00.096] @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 [ 0.716s] 5 tests run: 2 passed, 3 failed, 0 skipped >  FAIL [ 0.601s] (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 0.60s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.683] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 03:33:59.684] @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 03:33:59.686] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 03:33:59.691] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 03:33:59.794] @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 03:33:59.794] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 03:33:59.795] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 03:33:59.795] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 03:33:59.796] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 03:34:00.098] @commands::generate INFO : > Integrand generation summary > peak RAM 95.38 MiB | cores 1 > ╭───────────┬───────┬─────────┬─────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 41ms (48%) │ 20ms (24%) │ 24ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 59ms (31%) │ 59ms (32%) │ 70ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 101ms (37%) │ 80ms (29%) │ 94ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 03:34:00.099] @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 [ 0.601s] (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 0.60s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 03:33:59.684] @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 03:33:59.684] @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 03:33:59.684] @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 03:33:59.685] @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 03:33:59.686] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 03:33:59.687] @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 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 03:33:59.792] @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 03:33:59.792] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 03:33:59.792] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 03:33:59.792] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 03:33:59.793] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 03:34:00.096] @commands::generate INFO : > Integrand generation summary > peak RAM 96.34 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 36ms (45%) │ 20ms (26%) │ 23ms (30%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 58ms (31%) │ 59ms (32%) │ 69ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 94ms (35%) │ 79ms (30%) │ 93ms (35%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 03:34:00.096] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 03:34:00.097] @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 [ 0.714s] (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 0.71s >  >   stderr --- > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.683] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 03:33:59.684] @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 03:33:59.686] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 03:33:59.691] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 03:33:59.789] @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 03:33:59.790] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 03:33:59.790] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 03:33:59.790] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 03:33:59.791] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 03:34:00.094] @commands::generate INFO : > Integrand generation summary > peak RAM 95.46 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 38ms (47%) │ 20ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 56ms (30%) │ 61ms (33%) │ 69ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 95ms (35%) │ 81ms (30%) │ 93ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 03:34:00.095] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 03:34:00.096] @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 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.683] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 03:33:59.684] @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 03:33:59.686] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 03:33:59.691] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 03:33:59.794] @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 03:33:59.794] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 03:33:59.795] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 03:33:59.795] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 03:33:59.796] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 03:34:00.098] @commands::generate INFO : > Integrand generation summary > peak RAM 95.38 MiB | cores 1 > ╭───────────┬───────┬─────────┬─────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 41ms (48%) │ 20ms (24%) │ 24ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 59ms (31%) │ 59ms (32%) │ 70ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 101ms (37%) │ 80ms (29%) │ 94ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 03:34:00.099] @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 0.60s > system-err > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.683] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 03:33:59.684] @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 03:33:59.686] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 03:33:59.691] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 03:33:59.794] @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 03:33:59.794] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 03:33:59.795] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 03:33:59.795] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 03:33:59.796] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 03:34:00.098] @commands::generate INFO : > Integrand generation summary > peak RAM 95.38 MiB | cores 1 > ╭───────────┬───────┬─────────┬─────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 41ms (48%) │ 20ms (24%) │ 24ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 59ms (31%) │ 59ms (32%) │ 70ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼─────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 101ms (37%) │ 80ms (29%) │ 94ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴─────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 03:34:00.099] @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 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 03:33:59.684] @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 03:33:59.684] @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 03:33:59.684] @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 03:33:59.685] @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 03:33:59.686] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 03:33:59.687] @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 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 03:33:59.792] @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 03:33:59.792] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 03:33:59.792] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 03:33:59.792] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 03:33:59.793] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 03:34:00.096] @commands::generate INFO : > Integrand generation summary > peak RAM 96.34 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 36ms (45%) │ 20ms (26%) │ 23ms (30%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 58ms (31%) │ 59ms (32%) │ 69ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 94ms (35%) │ 79ms (30%) │ 93ms (35%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 03:34:00.096] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 03:34:00.097] @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 0.60s > system-err > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 03:33:59.684] @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 03:33:59.684] @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 03:33:59.684] @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 03:33:59.685] @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 03:33:59.686] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 03:33:59.687] @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 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 03:33:59.693] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 03:33:59.694] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 03:33:59.792] @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 03:33:59.792] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 03:33:59.792] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 03:33:59.792] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 03:33:59.793] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 03:34:00.096] @commands::generate INFO : > Integrand generation summary > peak RAM 96.34 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 36ms (45%) │ 20ms (26%) │ 23ms (30%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 58ms (31%) │ 59ms (32%) │ 69ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 94ms (35%) │ 79ms (30%) │ 93ms (35%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 03:34:00.096] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 03:34:00.097] @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 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.683] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 03:33:59.684] @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 03:33:59.686] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 03:33:59.691] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 03:33:59.789] @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 03:33:59.790] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 03:33:59.790] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 03:33:59.790] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 03:33:59.791] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 03:34:00.094] @commands::generate INFO : > Integrand generation summary > peak RAM 95.46 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 38ms (47%) │ 20ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 56ms (30%) │ 61ms (33%) │ 69ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 95ms (35%) │ 81ms (30%) │ 93ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 03:34:00.095] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 03:34:00.096] @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 0.71s > system-err > Error: Python API test subprocess failed. > stdout: > > stderr: > [2026-09-14 03:33:59.643] @gammaloop_api::se... INFO : Running command import model sm-default > [2026-09-14 03:33:59.644] @import::model INFO : Loading built-in JSON model sm-default > [2026-09-14 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.682] @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 03:33:59.683] @gammaloop_api::se... INFO : Running command set default-runtime kv subtraction.disable_threshold_subtraction=true > [2026-09-14 03:33:59.684] @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 03:33:59.686] @feyngen::diagram_... INFO : 0s | Δ=0s | Starting Feynman graph generation with Symbolica... > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs resulting from Symbolica generation: 246 > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after enforcing supergraph particle content: 8 > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs retained after removal of vetoed topologies: 8 > [2026-09-14 03:33:59.689] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after vertex info assignment: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after all complete graphs filters are applied: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after closed anticommutating chains analysis: 8 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after fast Cutkosky cut filter is applied: 3 > [2026-09-14 03:33:59.690] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after symmetrization of external states: 3 > [2026-09-14 03:33:59.691] @feyngen::diagram_... INFO : 0s | Δ=0s | Number of graphs after canonization of vertices, edges and flows (graph labels assigned here): 3 > [2026-09-14 03:33:59.789] @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 03:33:59.790] @feyngen::diagram_... INFO : ( Sum of the symmetry factors from each graph generated = -3 ) > [2026-09-14 03:33:59.790] @commands::generate INFO : Generated cross-section 2 graphs. > [2026-09-14 03:33:59.790] @commands::generate INFO : Only diagram generation was requested, skipping integrand generation. You can generate integrands later using the 'generate existing ' command. > [2026-09-14 03:33:59.791] @gammaloop_api::se... INFO : Running command generate > [2026-09-14 03:34:00.094] @commands::generate INFO : > Integrand generation summary > peak RAM 95.46 MiB | cores 1 > ╭───────────┬───────┬─────────┬────────────┬────────────┬────────────────┬─────────────╮ > │ integrand │ graph │ # evals │ expr build │ spenso │ symbolica eval │ compile │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ default │ GL0 │ 3 │ 38ms (47%) │ 20ms (25%) │ 23ms (28%) │ 0ms (0.00%) │ > │ default │ GL2 │ 5 │ 56ms (30%) │ 61ms (33%) │ 69ms (37%) │ 0ms (0.00%) │ > ├───────────┼───────┼─────────┼────────────┼────────────┼────────────────┼─────────────┤ > │ Total │ │ 8 │ 95ms (35%) │ 81ms (30%) │ 93ms (34%) │ 0ms (0.00%) │ > ╰───────────┴───────┴─────────┴────────────┴────────────┴────────────────┴─────────────╯ > [2026-09-14 03:34:00.095] @gammaloop_api::se... INFO : Running command set process string ' > [quantities.leading_jet_pt] > type = "jet" > quantity = "PT" > dR = 0.4 > [...] > [2026-09-14 03:34:00.096] @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/pjzj80k3rmb55mn2s1vlwi2xqcssp4v1-gammaloop-nextest-python-api.drv Run failed.