Yes, excuse me-- this should be 32-bit specific as I believe Python will
not let me get a string long enough to overflow the integer on 64-bit.
It's a big string, the only realistic scenario I can see is XML parsing
or similar.

theory$ ./python -V
Python 2.5.2
theory$ cat /proc/cpuinfo | grep -i model
model           : 4
model name      : Intel(R) Pentium(R) 4 CPU 3.00GHz
theory$ ./python python-2.5.2-unicode_resize-utf7.py
Segmentation fault