[issue21497] faulthandler should handle sys.stderr being None gracefully

[Roundup Robot]

Roundup Robot added the comment:

New changeset ddd7db7cf036 by Victor Stinner in branch '3.4':
Issue #21497: faulthandler functions now raise a better error if sys.stderr is
http://hg.python.org/cpython/rev/ddd7db7cf036

New changeset cb26887f9140 by Victor Stinner in branch 'default':
(Merge 3.4) Issue #21497: faulthandler functions now raise a better error if
http://hg.python.org/cpython/rev/cb26887f9140

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nosy: +python-dev

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<http://bugs.python.org/issue21497>
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