Crash at startup

This bug is forwarded from ubuntu bug tracking system:
https://launchpad.net/distros/ubuntu/+source/jack-audio-connection-kit/+bug/70781

On Ubuntu edgy jack crashes when command line below is
given:

jackd -R -p64 -t1000 -dalsa -r44100 -p128 -n2 -D -Chw:1
-Phw:1,2 -S

Backtraces are attached to ubuntu bugreport, please let
me know if more details about the crash is needed.