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Thanks for a quick response!

OK, first thing first: your simpler testcase seems to expose
yet another problem, not the one I had. In particular, your
testcase segfaults for me on python2.4.2/bsddb4.3.0 but
*does not* segfault with python2.3.5/bsddb4.2.0.5

In my testcase, I can definitely blame the segfault on the
associate call, not on open. I can demonstrate it by either
commenting out the associate call (no segfault) or by
inserting a print statement right before the associate.

So your testcase does not seem to have an exact same problem
than my testcase. In my testcase nothing seems to depend on
variable names (as one would expect). I am rebuilding
python2.4 with your patch, will post results soon.