[issue20414] Python 3.4 has two Overlapped types

[STINNER Victor]

STINNER Victor added the comment:

I found this issue while I was trying to understand the issue of pending operations which are not cancelled. The issue #19565 changed the behaviour in the _winapi module, but not in the _overlapped module :-(

New changeset da10196b94f4 by Richard Oudkerk in branch 'default':
Issue #19565: Prevent warnings at shutdown about pending overlapped ops.
http://hg.python.org/cpython/rev/da10196b94f4

We know have two implementations. Which one is the best? I'm trying to understand why Python may crash on Windows with asyncio when the proactor event loop is used.

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