[issue38630] subprocess.Popen.send_signal() should poll the process

[STINNER Victor]

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

> (Except maybe eventually switch to pidfd or similar, but Victor says he wants to use a different issue for that.)

pidfd is not available on all platforms (ex: Windows).

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38630>
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