Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
Core was generated by `/usr/lib/firefox/firefox-bin https://launchpad.net/distros/ubuntu/+source/firef'.
Program terminated with signal 11, Segmentation fault.
#0  0xffffe410 in __kernel_vsyscall ()
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb7d88651 in raise () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x08057556 in nsProfileLock::FatalSignalHandler (signo=-1210531852)
    at nsProfileLock.cpp:206
	unblock_sigs = {__val = {1024, 0 <repeats 31 times>}}
	oldact = <value optimized out>
#3  <signal handler called>
#4  0xb7d83404 in pthread_mutex_lock () from /lib/tls/i686/cmov/libpthread.so.0
#5  0xac748b45 in ?? ()
#6  0xab4bd050 in ?? ()
#7  0x00000001 in ?? ()
#8  0x00000001 in ?? ()
#9  0x00000000 in ?? ()