[issue16730] _fill_cache in _bootstrap.py crashes without directory execute permissions

[Christian Heimes]

Christian Heimes added the comment:

NotADirectoryError is missing from the list of exception. The error can occur when the directory is removed and replaced by an ordinary file.

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nosy: +christian.heimes

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16730>
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