[issue20235] Argument Clinic: recover a bit more gracefully from exceptions

[Roundup Robot]

Roundup Robot added the comment:

New changeset acd31653e3b4 by Georg Brandl in branch 'default':
Closes #20235: Report file and line on unexpected exceptions in Argument Clinic.
http://hg.python.org/cpython/rev/acd31653e3b4

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nosy: +python-dev
resolution:  -> fixed
stage: commit review -> committed/rejected
status: open -> closed

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20235>
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