[issue30387] warning of threading_cleanup in test_threading

[STINNER Victor]

STINNER Victor added the comment:

Oh wait, I succeeded to reproduce the bug on master. In verbose mode, we even get the test name!

test_is_alive_after_fork (test.test_threading.ThreadTests) ... Warning -- threading_cleanup() failed to cleanup 0 threads after 3 sec (count: 0, dangling: 21)
ok

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30387>
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