[issue30479] improve asyncio debugging

[Andrew Svetlov]

Andrew Svetlov <andrew.svetlov at gmail.com> added the comment:

asyncio doesn't crash with scary messages like "AttributeError: 'NoneType' object has no attribute '_PENDING'" now.
Checked with Python 3.9+

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resolution:  -> out of date
stage:  -> resolved
status: open -> closed

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue30479>
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