[issue23960] PyErr_SetImportError doesn't clean up on some errors

[Berker Peksag]

Berker Peksag added the comment:

Thanks for the patch. I left review comments on Rietveld (click to the review link above).

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nosy: +berker.peksag
stage:  -> patch review
versions: +Python 3.6

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue23960>
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