[issue19888] possible memory corruption caused by for-loop iteration over namespace.items() in a metaclass defining __new__

[Barry A. Warsaw]

Barry A. Warsaw added the comment:

Note that just iterating over namespace doesn't trigger the problem, e.g. 
instead of 

    for name, value in namespace.items(): pass

using

    list(namespace.items())

seems to work.

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<http://bugs.python.org/issue19888>
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