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

[Chris Jerdonek]

Chris Jerdonek <chris.jerdonek at gmail.com> added the comment:


New changeset ff7a8b03c49153021d6de5d0b2fa8b5163059ed6 by Chris Jerdonek in branch 'master':
Use _PyErr_ChainStackItem() inside gen_send_ex(). (GH-20173)
https://github.com/python/cpython/commit/ff7a8b03c49153021d6de5d0b2fa8b5163059ed6


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