[issue17413] format_exception() breaks on exception tuples from trace function

[ingrid]

ingrid added the comment:

It seems that settrace works normally when an exception is raised in the python code with the raise keyword. If an exception is raised in the C code, settrace breaks as the C code passes all exceptions as strings. To fix this issue we just added a line to normalize the C exception within settrace. We included a regression test for this defect.

I paired on this with user bmac (http://bugs.python.org/user17692).

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keywords: +patch
nosy: +ingrid
Added file: http://bugs.python.org/file29837/issue17413.patch

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