[issue23338] PyErr_Format in ctypes uses invalid parameter

[Berker Peksag]

Changes by Berker Peksag <berker.peksag at gmail.com>:


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nosy: +amaury.forgeotdarc, belopolsky, meador.inge
stage:  -> patch review
type: crash -> behavior
versions: +Python 3.4, Python 3.5 -Python 3.6

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue23338>
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