Martin Panter <vadmium...@gmail.com> added the comment:
My guess is there is no message because in Python 3, errors are encoded
according to PYTHONIOENCODING. Perhaps it works as you expect if you bypass
sys.excepthook:
$ PYTHONIOENCODING=undefined python -c 'import sys, os; sys.excepthook = lambda
*exc: os.write(2, ascii(exc).encode()); print(u"abc")'
(<class 'UnicodeError'>, UnicodeError('undefined encoding',), <traceback object
at 0xb7037b94>)
----------
nosy: +martin.panter
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue32456>
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