[issue24758] unittest.mock.Mock's new "unsafe" feature needs a better error message

[Zackery Spytz]

Zackery Spytz <zspytz at gmail.com> added the comment:

I've created a PR for this issue.

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nosy: +ZackerySpytz
versions: +Python 3.8 -Python 3.5

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue24758>
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