[issue6721] Locks in the standard library should be sanitized on fork

[Kyle Evans]

Change by Kyle Evans <kevans at FreeBSD.org>:


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nosy: +kevans
nosy_count: 28.0 -> 29.0
pull_requests: +21627
pull_request: https://github.com/python/cpython/pull/22651

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue6721>
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