$ gdb metacity 3351
[...]
Program received signal SIGABRT, Aborted.
[Switching to Thread -1209039120 (LWP 3351)]
0x00298402 in __kernel_vsyscall ()
(gdb) bt
#0  0x00298402 in __kernel_vsyscall ()
#1  0x00c55ee9 in raise () from /lib/libc.so.6
#2  0x00c574f1 in abort () from /lib/libc.so.6
#3  0x00583c42 in g_logv () from /usr/lib/libglib-2.0.so.0
#4  0x00583c79 in g_log () from /usr/lib/libglib-2.0.so.0
#5  0x00583cf6 in g_assert_warning () from /usr/lib/libglib-2.0.so.0
#6  0x080557ad in ?? ()
#7  0x08062ad5 in ?? ()
#8  0x08062de8 in ?? ()
#9  0x08063089 in ?? ()
#10 0x0809d6ad in ?? ()
#11 0x0805fbb9 in ?? ()
#12 0x08093e7e in ?? ()
#13 0x02857191 in gdk_x11_drawable_get_xdisplay () from /usr/lib/libgdk-x11-2.0.so.0
#14 0x0285889c in gdk_events_pending () from /usr/lib/libgdk-x11-2.0.so.0
#15 0x0285a48b in gdk_events_pending () from /usr/lib/libgdk-x11-2.0.so.0
#16 0x0285a82f in gdk_add_client_message_filter () from /usr/lib/libgdk-x11-2.0.so.0
#17 0x0057b15d in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#18 0x0057e3ef in g_main_context_check () from /usr/lib/libglib-2.0.so.0
#19 0x0057e799 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#20 0x08070add in ?? ()
#21 0x00c434e4 in __libc_start_main () from /lib/libc.so.6
#22 0x08053bf1 in ?? ()