[issue31452] asyncio.gather does not cancel tasks if one fails

[Krzysztof Warunek]

Changes by Krzysztof Warunek <krzysztof at warunek.net>:


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keywords: +patch
pull_requests: +3588
stage: needs patch -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31452>
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