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Reading symbols from /usr/bin/gnome-shell...(no debugging symbols found)...done.
[New LWP 5975]
[New LWP 5985]

warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Core was generated by `/usr/bin/gnome-shell'.
Program terminated with signal SIGTRAP, Trace/breakpoint trap.
#0  0x00007fb2727a3ac0 in g_logv () from /usr/lib/libglib-2.0.so.0
(gdb) bt
#0  0x00007fb2727a3ac0 in g_logv () from /usr/lib/libglib-2.0.so.0
#1  0x00007fb2727a3cff in g_log () from /usr/lib/libglib-2.0.so.0
#2  0x00007fb2740cb6ce in meta_clutter_init () from /usr/lib/libmutter.so.0
#3  0x00007fb2740fbf12 in meta_init () from /usr/lib/libmutter.so.0
#4  0x0000000000401ddb in main ()