[issue19414] OrderedDict.values() behavior for modified instance

[Armin Rigo]

Armin Rigo added the comment:

Another option for the "try harder to raise RuntimeError" category (which I tend to like, because otherwise people are bound to write programs that rely on undocumented details):

In __delitem__() set link.next = None.  In the various iterators check explicitly if curr.next is None, and raise RuntimeError if it is.

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nosy: +arigo

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<http://bugs.python.org/issue19414>
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