[issue22778] list's in-place add doesn't return NotImplemented when appropriate

[Ethan Furman]

Ethan Furman added the comment:

My understanding was that if a different patch will be needed, it is not the same issue.  Is that not correct?

Here's the test:

    def test_iadd(self):
        ...
        self.assertRaises(TypeError, u.__iadd__, None)

It would still pass, as returning NotImplemented will still result in a TypeError, just with a friendlier message.

If any code is depending on this, it is depending on the error message text, which is explicitly not guaranteed

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22778>
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