[issue38546] test_concurrent_futures: reap_children() warnings on RHEL7 and RHEL8 buildbots

[Pablo Galindo Salgado]

Pablo Galindo Salgado <pablogsal at gmail.com> added the comment:

Ran 168 tests in 160.415s
OK (skipped=3)
Warning -- multiprocessing.process._dangling was modified by test_concurrent_futures
  Before: set()
  After:  {<weakref at 0x7fd136d66540; to 'ForkProcess' at 0x7fd136cd4a90>}

Another failure in AMD64 RHEL8 LTO + PGO 3.x

https://buildbot.python.org/all/#/builders/284/builds/300/steps/5/logs/stdio

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nosy: +pablogsal

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