#0  0x00007fc72a890a8b in raise (sig=11) at ../nptl/sysdeps/unix/sysv/linux/pt-raise.c:38
  [Error: ../nptl/sysdeps/unix/sysv/linux/pt-raise.c was not found in source tree]
#1  0x00007fc726279b2a in nsProfileLock::FatalSignalHandler (signo=11, info=0x7fff295a2630, context=0x7fff295a2500) at /build/buildd/firefox-23.0+build2/obj-x86_64-linux-gnu/toolkit/profile/nsProfileLock.cpp:180
  [Error: /build/buildd/firefox-23.0+build2/obj-x86_64-linux-gnu/toolkit/profile/nsProfileLock.cpp was not found in source tree]
#2  <signal handler called>
#3  0x00007fc715ae6a15 in unity_webapps_context_daemon_initable_init (initable=0x7fc6e9c72430, cancellable=0x7fc72a12fc00, error=0x7fc72a21f2e8) at unity-webapps-context.c:153
  [Error: unity-webapps-context.c was not found in source tree]
#4  0x00007fc72a12fc00 in ?? ()
#5  0x0000000000000001 in ?? ()
#6  0x00007fc6f4116c70 in ?? ()
#7  0x0000000000000000 in ?? ()