[issue23197] asyncio: check if a future is cancelled before calling set_result/set_exception

[STINNER Victor]

STINNER Victor added the comment:

Oh, I forgot that the change in subprocess.py (check if waiter is cancelled before setting its result) is already part of the issue #23197 which comes with an unit test.

The changes on the SSL handshake are still needed.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue23197>
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