Message 71651 - Python tracker

For what it's worth, py3k has a subtler recursion checking algorithm
which would probably fix this problem if backported properly. See
_Py_CheckRecursiveCall() in ceval.c (lines 462+), and especially the
role played by the tstate->overflowed flag, which allows a moderate
overflow of the recursion count in order for error handling code to
execute properly.