[issue18408] Fixes crashes found by pyfailmalloc

[Roundup Robot]

Roundup Robot added the comment:

New changeset 51eddca9dd6f by Victor Stinner in branch 'default':
Issue #18408: parsetok() must not write into stderr on memory allocation error
http://hg.python.org/cpython/rev/51eddca9dd6f

New changeset 5e50f1a0c985 by Victor Stinner in branch 'default':
Issue #18408: In debug mode, PyCFunction_Call() now checks if an exception was
http://hg.python.org/cpython/rev/5e50f1a0c985

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<http://bugs.python.org/issue18408>
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