[issue37380] subprocess.Popen._cleanup() "The handle is invalid" error when some old process is gone

[Ruslan Kuprieiev]

Ruslan Kuprieiev <kupruser at gmail.com> added the comment:

The `_active` code is pretty old and has not changed since 2.7, so it makes sense to backport it for now(also, should be very trivial to do that). To me, it doesn't seem dangerous to backport that, but I would love to hear what Eryk and others think :)

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37380>
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