[issue27558] SystemError with bare `raise` in threading or multiprocessing

[STINNER Victor]

STINNER Victor added the comment:

Thanks Xiang Zhang. The fix is obvious and simple, but it wasn't easy to identify it ;-) I pushed the fix to Python 3.5 and default (3.6).

Python 2.7 doesn't crash, the bare "raise" statement raises the exception: TypeError('exceptions must be old-style classes or derived from BaseException, not NoneType',). I suggest to not touch Python 2.7 and close the issue.

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<http://bugs.python.org/issue27558>
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