[issue35866] concurrent.futures deadlock

[Miro Hrončok]

Miro Hrončok <miro at hroncok.cz> added the comment:

Reverting 3b699932e5ac3e76031bbb6d700fbea07492641d makes problem go away.

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nosy: +hroncok

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35866>
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