compiled program segfaults

[wferi]

The enclosed program segfaults on the enclosed input, like

$ ./dissect <res.txt
[Sensible output]
Segmentation fault

This is with default compilation: ghc dissect.hs -o dissect
With optimalization enabled (ghc -O dissect.hs -o dissect) the same 
error does not happen.

This happens on Debian Woody, ghc apt-got from
deb http://www.syntaxpolice.org/haskell-experimental/ stable/
Linux kernel 2.4.20, libc 2.2.5-11.5

[hampusr]

Logged In: YES 
user_id=159064

Since the SIGSEGV appears in regfree I think this is the
very same bug as #802692. So there is nothing to do but wait
for next release or use version from CVS...

[simonmar]

Logged In: YES 
user_id=48280

Yes, this is the finalizer bug that affects
Text.Regex.Posix.  Will be fixed in 6.2.