Breakpoint 2, 0xb6ded7c0 in g_log () from /usr/lib/libglib-2.0.so.0
(gdb) where
#0  0xb6ded7c0 in g_log () from /usr/lib/libglib-2.0.so.0
#1  0xb6ded94e in g_return_if_fail_warning () from /usr/lib/libglib-2.0.so.0
#2  0xb75958c2 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#3  0x00000008 in ?? ()
#4  0xb6e14458 in ?? () from /usr/lib/libglib-2.0.so.0
#5  0xb7641782 in gtk_text_char_type () from /usr/lib/libgtk-x11-2.0.so.0
#6  0xb759c961 in gtk_combo_string_key () from /usr/lib/libgtk-x11-2.0.so.0
#7  0xb7622060 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#8  0x00000000 in ?? ()
#9  0xb756cddf in gtk_widget_get_toplevel () from /usr/lib/libgtk-x11-2.0.so.0
#10 0xb756cd68 in gtk_widget_get_toplevel () from /usr/lib/libgtk-x11-2.0.so.0
#11 0xb7459be6 in gtk_propagate_event () from /usr/lib/libgtk-x11-2.0.so.0
#12 0xb7622060 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#13 0x0867068c in ?? ()
#14 0x0867068c in ?? ()
#15 0xb7459d2d in gtk_main_do_event () from /usr/lib/libgtk-x11-2.0.so.0
#16 0x0867068c in ?? ()
#17 0xb6e8dd00 in pthread_mutex_destroy () from /lib/tls/libpthread.so.0
Previous frame inner to this frame (corrupt stack?)