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I hope re-opening this is the right thing to do (I'm new here).

Current CVS fails under Win2000+Cygwin with a 
segmentation fault in the updated test_b1.py. Easily 
reproduced:

$ ./python.exe
Python 2.3a0 (#1, Aug  7 2002, 12:18:38)
[GCC 2.95.3-5 (cygwin special)] on cygwin
Type "help", "copyright", "credits" or "license" for more 
information.
>>> import sys
>>> list(xrange(sys.maxint/4))
Segmentation fault (core dumped)

This does seem to be size-related, as:

>>> s = sys.maxint/8
>>> list(xrange(s))
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
MemoryError

which is as expected in test_b1.py