[issue28603] traceback module can't format/print unhashable exceptions

[Andreas Stührk]

Andreas Stührk added the comment:

It was reported as bug to a project that uses the traceback module (https://github.com/bpython/bpython/issues/651). Parsley (https://pypi.python.org/pypi/Parsley) is at least one library that uses unhashable exceptions, although I guess it's by accident: it defines __eq__, but not __hash__ and that makes the exception unhashable under Python 3.

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<http://bugs.python.org/issue28603>
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