[issue32456] PYTHONIOENCODING=undefined doesn't work in Python 3

[Martin Panter]

Martin Panter <vadmium+py at 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>)

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nosy: +martin.panter

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<https://bugs.python.org/issue32456>
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