[issue27122] Hang with contextlib.ExitStack and subprocess.Popen (regression)

[STINNER Victor]

STINNER Victor added the comment:

It's a regression introduced by the PEP 479 in Lib/contextlib.py by the changeset 36a8d935c322, "PEP 479: Change StopIteration handling inside generators (Closes issue #22906)".

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27122>
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