[issue15365] Traceback reporting can fail if IO cannot be imported

[Roundup Robot]

Roundup Robot <devnull at psf.upfronthosting.co.za> added the comment:

New changeset 54524897fafc by Kristján Valur Jónsson in branch 'default':
Issue #15365:  Make traceback reporting ignore any errors when printing out
http://hg.python.org/cpython/rev/54524897fafc

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nosy: +python-dev

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