[issue30064] BaseSelectorEventLoop.sock_{recv, sendall}() don't remove their callbacks when canceled

[Andrew Svetlov]

Change by Andrew Svetlov <andrew.svetlov at gmail.com>:


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keywords: +patch
pull_requests: +9699
stage:  -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue30064>
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