[issue28123] _PyDict_GetItem_KnownHash ignores DKIX_ERROR return

[STINNER Victor]

STINNER Victor added the comment:

I understand the the code doesn't handle correctly lookup failures. Such failure is easy to trigger in pure Python using a custom __eq__() method for example. Can you please write an unit test for it?

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<http://bugs.python.org/issue28123>
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