[issue5180] 3.1 cannot unpickle 2.7-created pickle

[Alexandre Vassalotti]

Alexandre Vassalotti <alexandre at peadrop.com> added the comment:

The args argument is always a tuple created with Pdata_poptuple(). You can add an explicit type check. If this check fails a RuntimeError should be raised, because this would indicate a programming error in pickle.

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<http://bugs.python.org/issue5180>
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