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

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

I don't understand why test_showwarnmsg_missing was added. Why deleting warnings._showwarnmsg should be supported?

I would rename _showwarning to _showwarning_orig for accenting it's purpose. It is used only for checking if showwarning was replaced by the user.

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