[issue25873] Faster ElementTree iterating

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Good catch Martin. I missed this case. Following patch fixes it.

Other bugs look similar. They presumably can be triggered when remove the element itself during executing the __next__() method. I have no a reproducer though.

I don't know wherever it is worth to fix these bugs in maintained releases.

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Added file: http://bugs.python.org/file41323/etree_iter2.patch

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