[issue24369] Using OrderedDict.move_to_end during iteration is problematic.

[Eric Snow]

Eric Snow added the comment:

Here's a patch that tracks changes to the C OrderedDict linked list, similar to how it's done in deque.  I've left the pure Python OrderedDict alone.

@Raymond, that state counter works great. :)

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keywords: +patch
stage: test needed -> patch review
Added file: http://bugs.python.org/file39610/issue24369-iteration-mutation.diff

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