WithThreadsTestPool.test_release_task_refs: flaky test or possible free-threading bug #118413
Description
This might be a free-threading related bug or possibly a flaky test. We should investigate and try to figure out the root cause.
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FAIL: test_release_task_refs (test.test_multiprocessing_spawn.test_threads.WithThreadsTestPool.test_release_task_refs)
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Traceback (most recent call last):
File "D:\a\cpython\cpython\Lib\test\_test_multiprocessing.py", line 2817, in test_release_task_refs
self.assertEqual(set(wr() for wr in refs), {None})
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: Items in the first set but not the second:
<test._test_multiprocessing.CountedObject object at 0x03E7CA50>
Originally reported by hugovk in #118331 (comment) (https://github.com/python/cpython/actions/runs/8884999534/attempts/1).