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

[STINNER Victor]

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

Steve Dower: "I triggered automatic backports to see how they go. Doesn't necessarily mean we'll merge them without looking more closely, but may as well check out what our automated tools suggest."

Thanks, I merged the backports.

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