varnish using 100% cpu

[Jodok Batlogg]

hi,

we're using varnish in production and have roughly every 10 days the  
problem that varnish is running at 100% CPU (but requests are beeing  
served "normally").

today i've been able to attach gdb to the running process, look a  
little bit around and generate a core dump.
if someone wants to help getting this bug solved - the core dump is at http://download.lovelysystems.com/public/core.1237

thanks

jodok