[issue20037] Calling traceback.format_exception() during Pyhon shutdown does crash Python

[Antoine Pitrou]

Antoine Pitrou added the comment:

Yes, the current idiom for calling PyModule_GetState in extension modules isn't safe (because it assumes nothing ever errors out, which can be wrong in the shutdown phase).

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nosy: +gvanrossum, ncoghlan, pitrou

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<http://bugs.python.org/issue20037>
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