[issue12161] StringIO AttributeError instead of ValueError after close..

[Catalin Iacob]

Catalin Iacob <iacobcatalin at gmail.com> added the comment:

Attached patch + test case.

Also tested cStringIO in 2.7 and io.StringIO in 3.2 and 3.3 tip and they aren't affected.

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keywords: +patch
nosy: +catalin.iacob
Added file: http://bugs.python.org/file22116/12161.patch

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