[Python-Dev] sre and regexp behave baldy under lowmemory conditions

[Jack Jansen]

Both regexp and sre don't behave well under low-memory conditions.

I noticed this because test_longexp basically ate all my memory (sigh, 
I think I'll finally have to give up my private memory allocator and
take the 15% performance hit, until I find the time to dig into
Vladimir's stuff) so the rest of the regressions tests ran under very
tight memory conditions.

test_re wasn't so bad, the only problem was that it crashed with a
"NULL return without an exception". test_regexp was worse, it crashed
my machine.

If someone feels the urge maybe they could run the testsuite on unix
with a sufficiently low memory-limit.
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