#0  0x00002b2c3e25afcb in raise () from /lib/libpthread.so.0
#1  0x000000000040fd36 in nsProfileLock::FatalSignalHandler (signo=11)
#2  <signal handler called>
#3  XQueryExtension (dpy=0x0, name=0x2b2c4195ff11 "MIT-SHM", 
#4  0x00002b2c3ed17aa4 in XInitExtension (dpy=0x0, 
#5  0x00002b2c4195fc09 in XextAddDisplay (extinfo=0x2b2c41b62c40, dpy=0x0, 
#6  0x00002b2c4195b28e in XShmDetach (dpy=0x0, shminfo=0x2b2c4195ff11)
#7  0x00002aaaaf03adba in NPP_Destroy (instance=0x3f21388, 
#8  0x00002aaaaf03b599 in Private_Destroy (instance=0x0, save=0x2b2c4195ff11)
#9  0x00002b2c4710d981 in ns4xPluginInstance::Stop (this=0x3f21350)
#10 0x00002b2c480535fb in StopPluginInstance (aShell=<value optimized out>, 
#11 0x00002b2c48054388 in PresShell::EnumeratePlugins (this=0x20bb310, 
#12 0x00002b2c4805476c in PresShell::Freeze (this=0x20bb310)
#13 0x00002b2c480458da in DocumentViewerImpl::Destroy (this=0x3019a30)
#14 0x00002b2c48044dea in DocumentViewerImpl::Show (this=0x3c14f30)
#15 0x00002b2c4804ca44 in nsPresContext::EnsureVisible (this=0x3d64b40, 
#16 0x00002b2c480592ef in PresShell::UnsuppressAndInvalidate (this=0x38c6310)
#17 0x00002b2c4805969e in PresShell::UnsuppressPainting (this=0x38c6310)
#18 0x00002b2c3db957fe in nsTimerImpl::Fire (this=0x36c5e10)
#19 0x00002b2c3db95eaa in handleTimerEvent (event=<value optimized out>)
#20 0x00002b2c3db919b9 in PL_HandleEvent (self=0x2aaab40e72c0) at plevent.c:688
  [Error: plevent.c was not found in source tree]
#21 0x00002b2c3db91c5b in PL_ProcessPendingEvents (self=0x7d37c0)
#22 0x00002b2c3db93a2b in nsEventQueueImpl::ProcessPendingEvents (
#23 0x00002b2c47bf8052 in event_processor_callback (
#24 0x00002b2c411fffd3 in IA__g_main_context_dispatch (context=0x64ae50)
#25 0x00002b2c412032dd in g_main_context_iterate (context=0x64ae50, block=1, 
#26 0x00002b2c412035ea in IA__g_main_loop_run (loop=0xf7d980)
#27 0x00002b2c3e5be883 in IA__gtk_main ()
#28 0x00002b2c47bf8405 in nsAppShell::Run (this=0xd369e0) at nsAppShell.cpp:139
  [Error: nsAppShell.cpp was not found in source tree]
#29 0x00002b2c4ab3ef1e in nsAppStartup::Run (this=0xd36960)
#30 0x0000000000407700 in XRE_main (argc=<value optimized out>, 
#31 0x00002b2c3f31bb44 in __libc_start_main () from /lib/libc.so.6
#32 0x0000000000403889 in _start ()