(gtk3-demo:79223): GLib-CRITICAL **: g_hash_table_lookup: assertion `hash_table != NULL' failed

Program received signal SIGTRAP, Trace/breakpoint trap.
0x00000001011701db in g_logv ()
(gdb) where
#0  0x00000001011701db in g_logv ()
#1  0x000000010117045d in g_log ()
#2  0x00000001011704c0 in g_return_if_fail_warning ()
#3  0x000000010114b6ea in g_hash_table_lookup ()
#4  0x0000000100221eae in key_hash_insert_entry ()
#5  0x0000000100221f9d in key_hash_get_keycode_hash ()
#6  0x0000000100222812 in _gtk_key_hash_lookup ()
#7  0x000000010046421e in gtk_window_activate_key ()
#8  0x000000010045de3a in gtk_window_key_press_event ()
#9  0x0000000100244b1c in _gtk_marshal_BOOLEAN__BOXEDv ()
#10 0x00000001010a11da in g_type_class_meta_marshalv ()
#11 0x00000001010a0bf8 in _g_closure_invoke_va ()
#12 0x00000001010c45ca in g_signal_emit_valist ()
#13 0x00000001010c5ff4 in g_signal_emit ()
#14 0x000000010043b664 in gtk_widget_event_internal ()
#15 0x000000010043aab4 in gtk_widget_event ()
#16 0x0000000100244637 in propagate_event ()
#17 0x00000001002447ab in gtk_propagate_event ()
#18 0x0000000100242d5b in gtk_main_do_event ()
#19 0x0000000100794203 in _gdk_event_emit ()
#20 0x00000001007c36a7 in gdk_event_dispatch ()
#21 0x0000000101163390 in g_main_dispatch ()
#22 0x00000001011640e4 in g_main_context_dispatch ()
#23 0x0000000101164347 in g_main_context_iterate ()
#24 0x00000001011648e4 in g_main_loop_run ()
#25 0x000000010024205b in gtk_main ()
#26 0x00000001000292ff in main ()
