[issue23140] InvalidStateError on asyncio subprocess task cancelled

[STINNER Victor]

STINNER Victor added the comment:

> I'm okay with leaving the other unguarded set_result() call unchanged, but I'm also okay with putting "if not self.waiter.cancelled():" around it.

While playing with asyncio to try to inject errors on this code path, I found even more severe issues: see the issue #23173 which proposes to fix them.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue23140>
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