[issue30626] "SystemError: <class '_io.TextIOWrapper'> returned NULL without setting an error" from open function

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

In rare circumstances PyImport_Import() could return NULL without raising an error.

It *isn't* fixed in 3.7.

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stage: needs patch -> patch review
versions: +Python 3.7

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<http://bugs.python.org/issue30626>
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