From c.l.py:

"""
From: Pavel Pergamenshchik <pp64@cornell.edu>
Sent: Sunday, August 25, 2002 9:17 PM
To: python-list@python.org
Subject: Python 2.2.1 bug

I found a way to break Python 2.2.1 (at least) both on 
Linux and Windows.
...

eval("int" + ".__call__"*100000)

at the prompt, then press ctrl-D or ctrl-Z to edit. This 
will result in a segfault on Linux and some 
weird "unknown software exception" thing on Windows.
"""

At shutdown, the C stack is blown by a very deep 
nest of

_Py_Dealloc
wrapper_dealloc

calls.  That was under current CVS head; I'm sure it's 
the same deal in 2.2.