[issue17900] Recursive OrderedDict pickling

[Raymond Hettinger]

Raymond Hettinger added the comment:

This patch caused a regression by breaking designed-in support for pickling using PyYAML (note, there was a test for yaml support, but this patch defeated the test).  As a result of the patch, ordering now gets lost during a dump/load roundtrip.

This change should not have been committed without my review (I would have caught the problem instantly).

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resolution: fixed -> 
stage: resolved -> needs patch
status: closed -> open
type: enhancement -> behavior
versions: +Python 3.5
Added file: http://bugs.python.org/file37103/test_yaml.py

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<http://bugs.python.org/issue17900>
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