[issue2090] __import__ with fromlist=[''] causes double initialization of modules

[Raymond Hettinger]

Raymond Hettinger <rhettinger at users.sourceforge.net> added the comment:

I concur with Brett.  For the most part, we don't care about implementation artifacts and undefined behaviors (as long as it doesn't segfault).

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nosy: +rhettinger

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<http://bugs.python.org/issue2090>
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