Comment 4 for bug 574876

I seem to be able to trigger this by moving the mouse in circles over the swell-foop window, hope the partial backtrace
helps.

$ file !$
file /usr/lib/libclutter-glx-1.0.so.0.200.4
/usr/lib/libclutter-glx-1.0.so.0.200.4: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, stripped
$ md5sum !$
md5sum /usr/lib/libclutter-glx-1.0.so.0.200.4
ed303f2ecc7ced5e954155c9dedbb7dd /usr/lib/libclutter-glx-1.0.so.0.200.4

$ LD_LIBRARY_PATH="/usr/lib/gnome-games${LD_LIBRARY_PATH+:$LD_LIBRARY_PATH}" gdb seed /usr/share/gnome-games/swell-foop/main.js
GNU gdb (GDB) 7.1-ubuntu
...
Reading symbols from /usr/bin/seed...(no debugging symbols found)...done.
"/usr/share/gnome-games/swell-foop/main.js" is not a core dump: File format not recognized
(gdb) r /usr/share/gnome-games/swell-foop/main.js
Starting program: /usr/bin/seed /usr/share/gnome-games/swell-foop/main.js
[Thread debugging using libthread_db enabled]

[New Thread 0x7fffeb03d710 (LWP 4355)]

Program received signal SIGSEGV, Segmentation fault.
0x00007fffe7fc9fd0 in ?? () from /usr/lib/libclutter-glx-1.0.so.0
(gdb)
(gdb) bt
#0 0x00007fffe7fc9fd0 in ?? () from /usr/lib/libclutter-glx-1.0.so.0
#1 0x00007fffe7ff992b in ?? () from /usr/lib/libclutter-glx-1.0.so.0
#2 0x00007fffe7ff9ba8 in ?? () from /usr/lib/libclutter-glx-1.0.so.0
#3 0x00007fffe8001fd3 in ?? () from /usr/lib/libclutter-glx-1.0.so.0
#4 0x00007fffe8014958 in ?? () from /usr/lib/libclutter-glx-1.0.so.0
#5 0x00007fffe8003160 in ?? () from /usr/lib/libclutter-glx-1.0.so.0
#6 0x00007ffff71768c2 in g_main_dispatch (context=0x643920)
    at /build/buildd/glib2.0-2.24.1/glib/gmain.c:1960
#7 IA__g_main_context_dispatch (context=0x643920)
    at /build/buildd/glib2.0-2.24.1/glib/gmain.c:2513
#8 0x00007ffff717a748 in g_main_context_iterate (context=0x643920,
    block=<value optimised out>, dispatch=<value optimised out>,
    self=<value optimised out>)
    at /build/buildd/glib2.0-2.24.1/glib/gmain.c:2591
#9 0x00007ffff717ac55 in IA__g_main_loop_run (loop=0xd17bb0)
    at /build/buildd/glib2.0-2.24.1/glib/gmain.c:2799
#10 0x00007ffff544bb27 in IA__gtk_main ()
    at /build/buildd/gtk+2.0-2.20.1/gtk/gtkmain.c:1219
#11 0x00007ffff6d21efc in ffi_call_unix64 () from /usr/lib/libffi.so.5
#12 0x00007ffff6d21c84 in ffi_call () from /usr/lib/libffi.so.5
#13 0x00007ffff6f2e447 in g_function_info_invoke ()
   from /usr/lib/libgirepository-1.0.so.0
#14 0x00007ffff7bc8f7f in ?? () from /usr/lib/libseed.so.0
#15 0x00007ffff6342e7e in JSC::JSCallbackObject<JSC::JSObject>::call(JSC::ExecState*, JSC::JSObject*, JSC::JSValue, JSC::ArgList const&) ()
   from /usr/lib/libwebkit-1.0.so.2
#16 0x00007ffff638ed70 in cti_op_call_NotJSFunction (
    args=<value optimised out>) at ../JavaScriptCore/jit/JITStubs.cpp