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

[STINNER Victor]

STINNER Victor added the comment:

Patch version 3: fix test_warnings when running the test with python3 -Werror. Reset filters in the new unit test.

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Added file: http://bugs.python.org/file45769/warnings_fix-3.patch

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<http://bugs.python.org/issue28835>
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