[issue41739] test_logging: threading_cleanup() failed to cleanup 1 threads (count: 1, dangling: 2)

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

Same isuse on s390x RHEL7 LTO + PGO 3.x:
https://buildbot.python.org/all/#/builders/244/builds/45

Warning -- threading_cleanup() failed to cleanup 1 threads (count: 1, dangling: 2)
Warning -- Dangling thread: <_MainThread(MainThread, started 4396860012288)>
Warning -- Dangling thread: <Thread(Thread-4, started daemon 4396701710608)>

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