Segfault during mutation run

Inizia riproducendo mutmut run con le impostazioni pyproject.toml indicate e l’ambiente Python 3.9. Concentrati su PyRoute/Pathfinding/single_source_dijkstra.py e Tests/Pathfinding/testApproximateShortestPathTreeRegressions.py, in particolare su test_stars_node_types_owned. Il lavoro è completato quando l’esecuzione delle mutazioni non produce più i segmentation fault segnalati e il suo avanzamento o la sua velocità è coerente con l’esecuzione effettiva.

Mutmut version: 22f3924b6b5a2ff7916c1f62aa1ed1f3341e42ee
Python version: 3.9.21
OS: Fedora Linux 41

Repo: https://github.com/makhidkarun/traveller_pyroute

pyproject.toml bits:

paths_to_mutate = ["PyRoute/"]
tests_dir = ["Tests/"]
also_copy = ["Tests/", "PyRoute/Pathfinding/*.so"]
runner = "pytest -x"

After getting past #412 , I'm now actually getting mutants to run - just, at the moment, not cleanly.
Run in question:

  (venv) alex@localhost:~/gitstuf/traveller_pyroute$ mutmut run
⠋ Generating mutants
    done in 51590ms
⠼ Listing all tests 
⠋ Running clean tests
    done
⠼ Running forced fail test
    done
Running mutation testing
⠙ 29999/30093  🎉 24 🫥 29969  ⏰ 0  🤔 0  🙁 6  🔇 0Fatal Python error: Segmentation fault

Current thread 0x00007f986014e740 (most recent call first):
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 253 in x_explicit_shortest_path_dijkstra_distance_graph__mutmut_orig
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 43 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 769 in explicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 102 in x_implicit_shortest_path_dijkstra_distance_graph__mutmut_5
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 50 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 235 in implicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/Tests/Pathfinding/testApproximateShortestPathTreeRegressions.py", line 278 in test_stars_node_types_owned
  File "/usr/lib64/python3.9/unittest/case.py", line 550 in _callTestMethod
  File "/usr/lib64/python3.9/unittest/case.py", line 592 in run
  File "/usr/lib64/python3.9/unittest/case.py", line 651 in __call__
  File "/home/alex/gitstuf/traveller_pyroute/venv/lib64/python3.9/site-packages/_pytest/unittest.py", line 343 in runtest
<elided>
⠇ 30016/30093  🎉 32 🫥 29969  ⏰ 6  🤔 0  🙁 8  🔇 0Fatal Python error: Segmentation fault

Current thread 0x00007f986014e740 (most recent call first):
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 337 in x_explicit_shortest_path_dijkstra_distance_graph__mutmut_6
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 50 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 769 in explicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 56 in x_implicit_shortest_path_dijkstra_distance_graph__mutmut_orig
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 43 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 235 in implicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/Tests/Pathfinding/testApproximateShortestPathTreeRegressions.py", line 278 in test_stars_node_types_owned
  File "/usr/lib64/python3.9/unittest/case.py", line 550 in _callTestMethod
  File "/usr/lib64/python3.9/unittest/case.py", line 592 in run
  File "/usr/lib64/python3.9/unittest/case.py", line 651 in __call__
  File "/home/alex/gitstuf/traveller_pyroute/venv/lib64/python3.9/site-packages/_pytest/unittest.py", line 343 in runtest
<elided>
⠼ 30022/30093  🎉 32 🫥 29969  ⏰ 12  🤔 0  🙁 8  🔇 0Fatal Python error: Segmentation fault

Current thread 0x00007f986014e740 (most recent call first):
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 421 in x_explicit_shortest_path_dijkstra_distance_graph__mutmut_12
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 50 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 769 in explicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 56 in x_implicit_shortest_path_dijkstra_distance_graph__mutmut_orig
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 43 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 235 in implicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/Tests/Pathfinding/testApproximateShortestPathTreeRegressions.py", line 278 in test_stars_node_types_owned
  File "/usr/lib64/python3.9/unittest/case.py", line 550 in _callTestMethod
  File "/usr/lib64/python3.9/unittest/case.py", line 592 in run
  File "/usr/lib64/python3.9/unittest/case.py", line 651 in __call__
  File "/home/alex/gitstuf/traveller_pyroute/venv/lib64/python3.9/site-packages/_pytest/unittest.py", line 343 in runtest
<elided>
⠴ 30023/30093  🎉 32 🫥 29969  ⏰ 13  🤔 0  🙁 8  🔇 0Fatal Python error: Segmentation fault

Current thread 0x00007f986014e740 (most recent call first):
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 435 in x_explicit_shortest_path_dijkstra_distance_graph__mutmut_13
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 50 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 769 in explicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 56 in x_implicit_shortest_path_dijkstra_distance_graph__mutmut_orig
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 43 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 235 in implicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/Tests/Pathfinding/testApproximateShortestPathTreeRegressions.py", line 278 in test_stars_node_types_owned
  File "/usr/lib64/python3.9/unittest/case.py", line 550 in _callTestMethod
  File "/usr/lib64/python3.9/unittest/case.py", line 592 in run
  File "/usr/lib64/python3.9/unittest/case.py", line 651 in __call__
  File "/home/alex/gitstuf/traveller_pyroute/venv/lib64/python3.9/site-packages/_pytest/unittest.py", line 343 in runtest
<elided>
⠧ 30035/30093  🎉 39 🫥 29969  ⏰ 16  🤔 0  🙁 8  🔇 0Fatal Python error: Segmentation fault

Current thread 0x00007f986014e740 (most recent call first):
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 589 in x_explicit_shortest_path_dijkstra_distance_graph__mutmut_24
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 50 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 769 in explicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 56 in x_implicit_shortest_path_dijkstra_distance_graph__mutmut_orig
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 43 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 235 in implicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/Tests/Pathfinding/testApproximateShortestPathTreeRegressions.py", line 278 in test_stars_node_types_owned
  File "/usr/lib64/python3.9/unittest/case.py", line 550 in _callTestMethod
  File "/usr/lib64/python3.9/unittest/case.py", line 592 in run
  File "/usr/lib64/python3.9/unittest/case.py", line 651 in __call__
  File "/home/alex/gitstuf/traveller_pyroute/venv/lib64/python3.9/site-packages/_pytest/unittest.py", line 343 in runtest
<elided>
⠏ 30037/30093  🎉 41 🫥 29969  ⏰ 16  🤔 0  🙁 8  🔇 0Fatal Python error: Segmentation fault

Current thread 0x00007f986014e740 (most recent call first):
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 631 in x_explicit_shortest_path_dijkstra_distance_graph__mutmut_27
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 50 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 769 in explicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 56 in x_implicit_shortest_path_dijkstra_distance_graph__mutmut_orig
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 43 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 235 in implicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/Tests/Pathfinding/testApproximateShortestPathTreeRegressions.py", line 278 in test_stars_node_types_owned
  File "/usr/lib64/python3.9/unittest/case.py", line 550 in _callTestMethod
  File "/usr/lib64/python3.9/unittest/case.py", line 592 in run
  File "/usr/lib64/python3.9/unittest/case.py", line 651 in __call__
  File "/home/alex/gitstuf/traveller_pyroute/venv/lib64/python3.9/site-packages/_pytest/unittest.py", line 343 in runtest
<elided>
⠋ 30038/30093  🎉 41 🫥 29969  ⏰ 17  🤔 0  🙁 8  🔇 0Fatal Python error: Segmentation fault

Current thread 0x00007f986014e740 (most recent call first):
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 645 in x_explicit_shortest_path_dijkstra_distance_graph__mutmut_28
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 50 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 769 in explicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 56 in x_implicit_shortest_path_dijkstra_distance_graph__mutmut_orig
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 43 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 235 in implicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/Tests/Pathfinding/testApproximateShortestPathTreeRegressions.py", line 278 in test_stars_node_types_owned
  File "/usr/lib64/python3.9/unittest/case.py", line 550 in _callTestMethod
  File "/usr/lib64/python3.9/unittest/case.py", line 592 in run
  File "/usr/lib64/python3.9/unittest/case.py", line 651 in __call__
  File "/home/alex/gitstuf/traveller_pyroute/venv/lib64/python3.9/site-packages/_pytest/unittest.py", line 343 in runtest
<elided>
⠇ 30093/30093  🎉 87 🫥 29969  ⏰ 22  🤔 0  🙁 8  🔇 0
0.25 mutations/second

That mutation test(?) rate is also misleading - that run didn't take 200 minutes, as you would expect from 30k mutants at 0.25 mutants/sec, more like 10-15 minutes (at a guess).

Running only testApproximateShortestPathTreeRegressions.py (ie, runner = "pytest -x -k testApproximateShortestPathTreeRegressions") results in the following run output:

(venv) alex@localhost:~/gitstuf/traveller_pyroute$ mutmut run
⠼ Generating mutants
    done in 34385ms
⠇ Listing all tests 
⠼ Running clean tests
    done
⠋ Running forced fail test
    done
Running mutation testing
⠙ 30003/30093  🎉 26 🫥 29969  ⏰ 0  🤔 0  🙁 8  🔇 0Fatal Python error: Segmentation fault

Current thread 0x00007fd491b6c740 (most recent call first):
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 253 in x_explicit_shortest_path_dijkstra_distance_graph__mutmut_orig
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 43 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 769 in explicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 102 in x_implicit_shortest_path_dijkstra_distance_graph__mutmut_5
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 50 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 235 in implicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/Tests/Pathfinding/testApproximateShortestPathForest.py", line 56 in test_unified_can_handle_singleton_landmarks
<elided>
⠦ 30018/30093  🎉 35 🫥 29969  ⏰ 5  🤔 0  🙁 8  🔇 0Fatal Python error: Segmentation fault

Current thread 0x00007fd491b6c740 (most recent call first):
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 337 in x_explicit_shortest_path_dijkstra_distance_graph__mutmut_6
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 50 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 769 in explicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 56 in x_implicit_shortest_path_dijkstra_distance_graph__mutmut_orig
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 43 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 235 in implicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/Tests/Pathfinding/testApproximateShortestPathForest.py", line 56 in test_unified_can_handle_singleton_landmarks
<elided>
⠙ 30023/30093  🎉 37 🫥 29969  ⏰ 8  🤔 0  🙁 8  🔇 0Fatal Python error: Segmentation fault

Current thread 0x00007fd491b6c740 (most recent call first):
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 407 in x_explicit_shortest_path_dijkstra_distance_graph__mutmut_11
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 50 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 769 in explicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 56 in x_implicit_shortest_path_dijkstra_distance_graph__mutmut_orig
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 43 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 235 in implicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/Tests/Pathfinding/testApproximateShortestPathForest.py", line 180 in test_add_tree_to_unified_forest
<elided>
Fatal Python error: Segmentation fault

Current thread 0x00007fd491b6c740 (most recent call first):
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 421 in x_explicit_shortest_path_dijkstra_distance_graph__mutmut_12
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 50 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 769 in explicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 56 in x_implicit_shortest_path_dijkstra_distance_graph__mutmut_orig
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 43 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 235 in implicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/Tests/Pathfinding/testApproximateShortestPathForest.py", line 56 in test_unified_can_handle_singleton_landmarks
<elided>
Fatal Python error: Segmentation fault

Current thread 0x00007fd491b6c740 (most recent call first):
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 435 in x_explicit_shortest_path_dijkstra_distance_graph__mutmut_13
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 50 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 769 in explicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 56 in x_implicit_shortest_path_dijkstra_distance_graph__mutmut_orig
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 43 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 235 in implicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/Tests/Pathfinding/testApproximateShortestPathForest.py", line 56 in test_unified_can_handle_singleton_landmarks
<elided>
⠴ 30037/30093  🎉 44 🫥 29969  ⏰ 13  🤔 0  🙁 8  🔇 0Fatal Python error: Segmentation fault

Current thread 0x00007fd491b6c740 (most recent call first):
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 589 in x_explicit_shortest_path_dijkstra_distance_graph__mutmut_24
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 50 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 769 in explicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 56 in x_implicit_shortest_path_dijkstra_distance_graph__mutmut_orig
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 43 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 235 in implicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/Tests/Pathfinding/testApproximateShortestPathForest.py", line 56 in test_unified_can_handle_singleton_landmarks
<elided>
⠧ 30039/30093  🎉 46 🫥 29969  ⏰ 13  🤔 0  🙁 8  🔇 0Fatal Python error: Segmentation fault

Current thread 0x00007fd491b6c740 (most recent call first):
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 631 in x_explicit_shortest_path_dijkstra_distance_graph__mutmut_27
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 50 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 769 in explicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 56 in x_implicit_shortest_path_dijkstra_distance_graph__mutmut_orig
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 43 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 235 in implicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/Tests/Pathfinding/testApproximateShortestPathForest.py", line 56 in test_unified_can_handle_singleton_landmarks
<elided>
Fatal Python error: Segmentation fault

Current thread 0x00007fd491b6c740 (most recent call first):
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 645 in x_explicit_shortest_path_dijkstra_distance_graph__mutmut_28
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 50 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 769 in explicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 56 in x_implicit_shortest_path_dijkstra_distance_graph__mutmut_orig
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 43 in _mutmut_trampoline
  File "/home/alex/gitstuf/traveller_pyroute/mutants/PyRoute/Pathfinding/single_source_dijkstra.py", line 235 in implicit_shortest_path_dijkstra_distance_graph
  File "/home/alex/gitstuf/traveller_pyroute/Tests/Pathfinding/testApproximateShortestPathForest.py", line 56 in test_unified_can_handle_singleton_landmarks
<elided>
⠼ 30093/30093  🎉 93 🫥 29969  ⏰ 15  🤔 0  🙁 8  🔇 0
0.51 mutations/second

As far as I can tell, those tests aren't segfaulting in the clean test run, so am I doing something (else) wrong?