I figured out how to do this:

Python 2.5.2 (r252:60911, Jul 16 2008, 01:44:22) 
[GCC 4.0.1 (Apple Computer, Inc. build 5370)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import pdb
>>> import sys, os, locale
>>> pdb.run('locale.getpreferredencoding()')                      
> <string>(1)<module>()
(Pdb) continue
Bus error

though I'm not sure if that is what I was meant to do either. (But it
strikes me as another plausible possibility.)