New submission from Nick Coghlan:
Try these in 3.3 (or Python 3.2 for the latter):
set() < collections.ChainMap().keys()
set() < collections.UserDict().keys()
Both fail with max recursion depth exceeded.
Given that both exhibit this behaviour, the core of the problem is quite
possibly in MutableMapping.
(Uncovered while attempting to find a tidier ChainMap-based way to implement
__subclasshook__ checks for ducktyping based on multiple methods)
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messages: 174286
nosy: ncoghlan
priority: normal
severity: normal
status: open
title: Recursion error comparing set() and MutableMapping.keys()
versions: Python 3.2, Python 3.3, Python 3.4
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue16373>
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