[issue31033] Improve traceback of cancelled tasks / add cancel() msg argument

[Łukasz Langa]

Łukasz Langa <lukasz at langa.pl> added the comment:


New changeset f02c3048dc2f22053a2ba56ef5987967b89c4be3 by Miss Islington (bot) in branch '3.9':
Use _PyErr_ChainStackItem() inside gen_send_ex(). (GH-20173) (#20202)
https://github.com/python/cpython/commit/f02c3048dc2f22053a2ba56ef5987967b89c4be3


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nosy: +lukasz.langa

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