pytest plugin re-runs all tests if a crash occurs inside a pytest_runtestloop hook when using pytest-xdist

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Type: Bug

Behaviour

when a crash occurs inside a pytest_runtestloop hook while the xdist plugin is active, it will attempt to re-run all tests.

Steps to reproduce:

1. create the following files:

   # tests/test_foo.py
   
   from pytest import mark
   
   
   @mark.parametrize('i', list(range(2)))
   def test_asdf(i: int):
       pass

   # tests/conftest.py
   
   from pytest import Session, hookimpl
   
   @hookimpl(tryfirst=True)
   def pytest_runtestloop(session: Session):
       raise Exception(f'failed running tests with args: {session.config.args}')

   // .vscode/settings.json
   
   {
       "python.testing.pytestArgs": [
           "tests", "-n", "auto"
       ],
       "python.testing.unittestEnabled": false,
       "python.testing.pytestEnabled": true
   }

2. use the test explorer to run the parametrized test:
   

3. check the test results tab. notice there are two separate crashes:

   INTERNALERROR> Exception: failed running tests with args: ['c:\\Users\\user\\asdf2\\tests\\test_foo.py::test_asdf[0]', 'c:\\Users\\user\\asdf2\\tests\\test_foo.py::test_asdf[1]']
   

   INTERNALERROR> Exception: failed running tests with args: ['c:\\Users\\user\\asdf2']
   

the first crash is expected, but the second one is not. it seems to be re-running pytest after the crash with the project root as the only argument, which tells pytest to run all tests in the project.

Extension version: 2025.1.2025022102
VS Code version: Code 1.97.2 (e54c774e0add60467559eb0d1e229c6452cf8447, 2025-02-12T23:20:35.343Z)
OS version: Windows_NT x64 10.0.22621
Modes:

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possibly related issues:

• "Run Test with Coverage" runs *all* tests when test execution fails #24307
• re-running a pytest test causes it to run all tests in the workspace vscode-python-debugger#338