[New-bugs-announce] [issue40500] test_multiprocessing_fork leaks processes on PPC64LE RHEL8 LTO + PGO 3.x

[STINNER Victor]

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

PPC64LE RHEL8 LTO + PGO 3.x:
https://buildbot.python.org/all/#/builders/450/builds/313

0:01:22 load avg: 7.01 [242/423/1] test_multiprocessing_fork failed (env changed) (1 min 17 sec) -- running: test_concurrent_futures (1 min 3 sec), test_multiprocessing_forkserver (1 min 19 sec)

Warning -- multiprocessing.Manager still has [<ForkProcess name='SyncManager-140' pid=225343 parent=219302 started>, <ForkProcess name='QueueManager-141' pid=225345 parent=219302 started>] active children after 5.1161000469874125 seconds

Warning -- Dangling processes: {<ForkProcess name='QueueManager-141' pid=225345 parent=219302 started>}

Warning -- multiprocessing.Manager still has [<ForkProcess name='QueueManager-141' pid=225345 parent=219302 started>, <ForkProcess name='SyncManager-143' pid=225542 parent=219302 started>] active children after 5.116447829990648 seconds

test__all__ (test.test_multiprocessing_fork.MiscTestCase) ... ok
test_answer_challenge_auth_failure (test.test_multiprocessing_fork.OtherTest) ... ok
test_deliver_challenge_auth_failure (test.test_multiprocessing_fork.OtherTest) ... ok
(...)

----------
components: Tests
messages: 368043
nosy: pitrou, tomMoral, vstinner
priority: normal
severity: normal
status: open
title: test_multiprocessing_fork leaks processes on PPC64LE RHEL8 LTO + PGO 3.x
versions: Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40500>
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