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test_notify multiprocessing test is flaky #130737

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@colesbury

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@colesbury

Bug report

Seen in https://github.com/python/cpython/actions/runs/13606907022/job/38039459160?pr=130732

FAIL: test_notify (test.test_multiprocessing_spawn.test_threads.WithThreadsTestCondition.test_notify)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "D:\a\cpython\cpython\Lib\test\_test_multiprocessing.py", line 1691, in test_notify
    self.assertReturnsIfImplemented(2, get_value, woken)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^
  File "D:\a\cpython\cpython\Lib\test\_test_multiprocessing.py", line 275, in assertReturnsIfImplemented
    return self.assertEqual(value, res)
           ~~~~~~~~~~~~~~~~^^^^^^^^^^^^
AssertionError: 2 != 1

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