[issue31931] test_concurrent_futures: ProcessPoolSpawnExecutorTest.test_shutdown_race_issue12456() leaked dangling process on x86 Tiger 3.x

[STINNER Victor]

New submission from STINNER Victor <victor.stinner at gmail.com>:

http://buildbot.python.org/all/#/builders/30/builds/109/steps/4/logs/stdio

0:24:58 load avg: 2.01 [274/407/1] test_concurrent_futures failed (env changed) (279 sec)
(...)
test_shutdown_race_issue12456 (test.test_concurrent_futures.ProcessPoolSpawnExecutorTest) ... 7.42s
Warning -- reap_children() reaped child process 3411
ok
(...)
Warning -- multiprocessing.process._dangling was modified by test_concurrent_futures
  Before: <_weakrefset.WeakSet object at 0x269fd54>
  After:  <_weakrefset.WeakSet object at 0x26a64cc>

----------
components: Tests
keywords: buildbot
messages: 305468
nosy: haypo
priority: normal
severity: normal
status: open
title: test_concurrent_futures: ProcessPoolSpawnExecutorTest.test_shutdown_race_issue12456() leaked dangling process on x86 Tiger 3.x
versions: Python 3.7

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31931>
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