Kristján Valur Jónsson <krist...@ccpgames.com> added the comment:

> There are other crashers we choose to ignore (involving gc.getreferrers, > 
> bytecode hacks, ctypes, etc).  I think this should go in that category
> and I would be happy to add a note to that effect in the docs for tertools.

Yes, including my previous example with repr()
a = None
for i in range(100000):
    a = {1: a}
repr(a)

This is a case where care has been taken for lists, tuples, but not dicts.  If 
we want to fix repr, the recursion checking shoudl probably go into 
PyObject_repr().  I'm not advocating for a fix, Just pointing out yet another 
way you can construct objects so that accessnig them will cause a crash.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue14507>
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