________________________ test_coverage_stop_in_threads _________________________
[gw1] linux -- Python 3.14.2 /nix/store/pmb8clh66mryha2ijzz3dg969drrkgj7-python3-3.14.2/bin/python3.14

    @pytest.mark.skipif(not testenv.SETTRACE_CORE, reason="gettrace is not supported with this core.")
    def test_coverage_stop_in_threads() -> None:
        has_started_coverage = []
        has_stopped_coverage = []

        def run_thread() -> None:  # pragma: nested
            """Check that coverage is stopping properly in threads."""
            deadline = time.time() + 5
            ident = threading.current_thread().ident
            if sys.gettrace() is not None:
                has_started_coverage.append(ident)
            while sys.gettrace() is not None:
                # Wait for coverage to stop
                time.sleep(0.01)
                if time.time() > deadline:
                    return
            has_stopped_coverage.append(ident)

        cov = coverage.Coverage()
        with cov.collect():
            t = threading.Thread(target=run_thread)
            t.start()

            time.sleep(0.1)
        t.join()

>       assert has_started_coverage == [t.ident]
E       assert [] == [140737212749504]
E
E         Right contains one more item: 140737212749504
E
E         Full diff:
E         + []
E         - [
E         -     140737212749504,
E         - ]

tests/test_concurrency.py:670: AssertionError
=========================== short test summary info ============================
FAILED tests/test_concurrency.py::test_coverage_stop_in_threads - assert [] == [140737212749504]

  Right contains one more item: 140737212749504

  Full diff:
  + []
  - [
  -     140737212749504,
  - ]
=================== 1 failed, 215 passed, 1 skipped in 3.98s ===================