[3.15] gh-156321: Don't eagerly log exceptions from a cancelled asyncio.shield() (GH-158590) - #158598
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…o.shield() (pythonGH-158590) When the outer future returned by shield() was cancelled, a callback was added to the inner future that reported its exception through the loop exception handler as soon as it completed, even if the exception was retrieved afterwards by awaiting the inner future or calling `exception()`. Remove the callback; an exception nobody retrieves is still reported by the inner future itself when it is garbage collected, like any other future. (cherry picked from commit 2095eab) Co-authored-by: Kumar Aditya <kumaraditya@python.org>
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October 2, 2026 12:57
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Oct 2, 2026
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When the outer future returned by shield() was cancelled, a callback was
added to the inner future that reported its exception through the loop
exception handler as soon as it completed, even if the exception was
retrieved afterwards by awaiting the inner future or calling
exception(). Remove the callback; an exception nobody retrieves isstill reported by the inner future itself when it is garbage collected,
like any other future.
(cherry picked from commit 2095eab)
Co-authored-by: Kumar Aditya kumaraditya@python.org