[New-bugs-announce] [issue44936] test_concurrent_futures: test_cancel_futures_wait_false() and test_interpreter_shutdown() failed on GHA Windows x64

[STINNER Victor]

New submission from STINNER Victor <vstinner at python.org>:

GitHub Action Windows x64:
https://github.com/python/cpython/runs/3342514542

test_concurrent_futures failed when tests are run in parallel, but then passed then re-run in verbose mode.

======================================================================
FAIL: test_cancel_futures_wait_false (test.test_concurrent_futures.ThreadPoolShutdownTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "D:\a\cpython\cpython\lib\test\test_concurrent_futures.py", line 486, in test_cancel_futures_wait_false
    rc, out, err = assert_python_ok('-c', """if True:
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "D:\a\cpython\cpython\lib\test\support\script_helper.py", line 160, in assert_python_ok
    return _assert_python(True, *args, **env_vars)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "D:\a\cpython\cpython\lib\test\support\script_helper.py", line 145, in _assert_python
    res.fail(cmd_line)
    ^^^^^^^^^^^^^^^^^^
  File "D:\a\cpython\cpython\lib\test\support\script_helper.py", line 72, in fail
    raise AssertionError("Process return code is %d\n"
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: Process return code is 3221225477
command line: ['D:\\a\\cpython\\cpython\\PCbuild\\amd64\\python.exe', '-X', 'faulthandler', '-I', '-c', 'if True:\n            from concurrent.futures import ThreadPoolExecutor\n            from test.test_concurrent_futures import sleep_and_print\n            if __name__ == "__main__":\n                t = ThreadPoolExecutor()\n                t.submit(sleep_and_print, .1, "apple")\n                t.shutdown(wait=False, cancel_futures=True)\n            ']

stdout:
---
apple
---

stderr:
---

---

======================================================================
FAIL: test_interpreter_shutdown (test.test_concurrent_futures.ThreadPoolShutdownTest)
0:01:59 load avg: 5.63 [100/428/1] test_lltrace passed -- running: test_regrtest (40.5 sec)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "D:\a\cpython\cpython\lib\test\test_concurrent_futures.py", line 307, in test_interpreter_shutdown
    rc, out, err = assert_python_ok('-c', """if 1:
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "D:\a\cpython\cpython\lib\test\support\script_helper.py", line 160, in assert_python_ok
    return _assert_python(True, *args, **env_vars)
0:01:59 load avg: 5.63 [101/428/1] test_ucn passed -- running: test_regrtest (40.5 sec)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
fetching http://www.pythontest.net/unicode/13.0.0/NamedSequences.txt ...
  File "D:\a\cpython\cpython\lib\test\support\script_helper.py", line 145, in _assert_python
    res.fail(cmd_line)
    ^^^^^^^^^^^^^^^^^^
  File "D:\a\cpython\cpython\lib\test\support\script_helper.py", line 72, in fail
    raise AssertionError("Process return code is %d\n"
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: Process return code is 3221225477
command line: ['D:\\a\\cpython\\cpython\\PCbuild\\amd64\\python.exe', '-X', 'faulthandler', '-I', '-c', 'if 1:\n            from concurrent.futures import ThreadPoolExecutor\n            from time import sleep\n            from test.test_concurrent_futures import sleep_and_print\n            if __name__ == "__main__":\n                context = \'\'\n                if context == "":\n                    t = ThreadPoolExecutor(5)\n                else:\n                    from multiprocessing import get_context\n                    context = get_context(context)\n                    t = ThreadPoolExecutor(5, mp_context=context)\n                t.submit(sleep_and_print, 1.0, "apple")\n            ']

stdout:
---
apple
---

stderr:
---

---

----------------------------------------------------------------------

Ran 226 tests in 109.440s

FAILED (failures=2, skipped=111)
test test_concurrent_futures failed
(...)
0:21:19 load avg: 0.02 Re-running test_concurrent_futures in verbose mode (matching: test_cancel_futures_wait_false, test_interpreter_shutdown)

test_interpreter_shutdown (test.test_concurrent_futures.ProcessPoolForkProcessPoolShutdownTest) ... skipped 'require unix system'
test_interpreter_shutdown (test.test_concurrent_futures.ProcessPoolForkserverProcessPoolShutdownTest) ... skipped 'require unix system'
test_interpreter_shutdown (test.test_concurrent_futures.ProcessPoolSpawnProcessPoolShutdownTest) ... 1.33s ok
test_cancel_futures_wait_false (test.test_concurrent_futures.ThreadPoolShutdownTest) ... 0.27s ok
test_interpreter_shutdown (test.test_concurrent_futures.ThreadPoolShutdownTest) ... 1.14s ok

----------------------------------------------------------------------

Ran 5 tests in 2.756s

OK (skipped=2)

----------
components: Tests
messages: 399768
nosy: lukasz.langa, pablogsal, vstinner
priority: normal
severity: normal
status: open
title: test_concurrent_futures: test_cancel_futures_wait_false() and test_interpreter_shutdown() failed on GHA Windows x64
versions: Python 3.11

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue44936>
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