[issue5709] PyObject_TypeCheck crashes the intepreter on extension callback functions

[Te-jé Rodgers <report@bugs.python.org> at psf.upfronthosting.co.za]

New submission from Te-jé Rodgers <contact at tejerodgers.com>:

When a python callable is called from an extension module using
PyEval_CallObjectWithKeywords, and that callable calls a function in the
extension module that uses PyObject_TypeCheck (or *ParseTuple with
"O!"), the interpreter crashes.

----------
components: Extension Modules
messages: 85651
nosy: trodgers
severity: normal
status: open
title: PyObject_TypeCheck crashes the intepreter on extension callback functions
versions: Python 3.0

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue5709>
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