[issue28123] _PyDict_GetItem_KnownHash ignores DKIX_ERROR return

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka+cpython at gmail.com>:


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nosy: +rhettinger, serhiy.storchaka

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28123>
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