(gdb) bt
#0 0x00002b43b1686bd8 in __lll_mutex_lock_wait () from /lib/libpthread.so.0
#1 0x00002b43b1682ac8 in _L_mutex_lock_106 () from /lib/libpthread.so.0
#2 0x00002b43b1682423 in pthread_mutex_lock () from /lib/libpthread.so.0
#3 0x00002b43ade25ffe in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#4 0x00002b43b0faade7 in g_main_context_prepare ()
from /usr/lib/libglib-2.0.so.0
#5 0x00002b43b0fab4ed in ?? () from /usr/lib/libglib-2.0.so.0
#6 0x00002b43b0fabb6a in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#7 0x00002b43ad642023 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#8 0x000000000040f859 in main ()
(gdb)