[issue28835] Change in behavior when overriding warnings.showwarning and with catch_warnings(record=True)

[STINNER Victor]

STINNER Victor added the comment:

It seems like a regression of Python 3.6, probably introduced by myself with add addition of warnings._showwarningmsg() and the source parameter.

----------
nosy: +haypo, ned.deily
priority: normal -> release blocker

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28835>
_______________________________________