[issue18408] Fixes crashes found by pyfailmalloc

[Roundup Robot]

Roundup Robot added the comment:

New changeset 4ef4578db38a by Victor Stinner in branch 'default':
Issue #18408: Add a new PyFrame_FastToLocalsWithError() function to handle
http://hg.python.org/cpython/rev/4ef4578db38a

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18408>
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