[issue10701] Error pickling a dict

[Alexandre Vassalotti]

Alexandre Vassalotti added the comment:

The mutating __getstate__ is very likely the problem here. I've attached a small test case which shows the described behavior.

We could fix this by always making a copy of any mutable container we  want to iterate over to save its items. Performance-wise this solution is not very attractive. We are better off documenting this behavior as a limitation of __getstate__.

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Added file: http://bugs.python.org/file29843/issue10701.py

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