[issue25359] io.open() fails to open ascii file if LANG env not set

[Ned Deily]

Ned Deily added the comment:

I can reproduce the problem using the MacPorts python2.7 but not the Apple-supplied Python 2.7 or the python.org one.  The difference seems to be that the MacPorts Python is built with the MacPorts-supplied GNU gettext and its libintl, whereas the others aren't (since Apple does not ship libintl).  I don't have time at the moment to dig into why the libintl version of setlocale retunes '' instead of 'US-ASCII'.  Perhaps locale.py or io could handle that case better?

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type: crash -> behavior

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue25359>
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