Terry J. Reedy added the comment:
Fixing 3.3 is more likely that 3.4. I can view RuntimeError as a bug less
obnoxious than crash, but others may differ. Ultimately, the release managers
can decide. This is definitely appropriate for 3.4, so please add tests. If the
patch is for 2.7, please do one for 3.3 or 3.4.
For 3.x, d.keys() is not an issue, but d.values() is.
>>> d = {}
>>> d[1] = d.keys()
>>> d
{1: dict_keys([1])}
>>> d[2] = d.values()
>>> d
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
RuntimeError: maximum recursion depth exceeded while getting the repr of a list
----------
nosy: +terry.reedy
stage: -> test needed
versions: +Python 3.3
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