(gdb) bt
#0 0x00007fcb7c236464 in gtk_bin_forall (container=0x559ad7bc71c0, include_internals=1, callback=0x7fcb7c280ca0 <gtk_container_children_callback>, callback_data=0x7ffccedd8d60) at ././gtk/gtkbin.c:170
#1 0x00007fcb7c28714e in gtk_container_get_all_children (container=0x559ad7bc71c0) at ././gtk/gtkcontainer.c:2741
#2 0x00007fcb7c28714e in gtk_container_focus (widget=0x559ad7bc71c0, direction=GTK_DIR_TAB_FORWARD) at ././gtk/gtkcontainer.c:2795
#3 0x00007fcb68c3cadb in gp_applet_focus (widget=0x559ad7bc71c0, dir=GTK_DIR_TAB_FORWARD) at gp-applet.c:361
#4 0x00007fcb7c34d66c in _gtk_marshal_BOOLEAN__ENUM (closure=0x559ad7b52170, return_value=0x7ffccedd8f50, n_param_values=<optimized out>, param_values=0x7ffccedd8fb0, invocation_hint=<optimized out>, marshal_data=<optimized out>) at ././gtk/gtkmarshalers.c:301
#5 0x00007fcb7aa7bc6f in g_closure_invoke () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#6 0x00007fcb7aa8e85d in () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#7 0x00007fcb7aa96b5f in g_signal_emit_valist () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#8 0x00007fcb7aa9749f in g_signal_emit () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#9 0x00007fcb7c49ed3a in gtk_widget_child_focus (widget=widget@entry=0x559ad7bc71c0, direction=direction@entry=GTK_DIR_TAB_FORWARD) at ././gtk/gtkwidget.c:10998
#10 0x00007fcb7c287264 in gtk_container_focus_move (direction=GTK_DIR_TAB_FORWARD, children=0x0, container=0x559ad7bb3370) at ././gtk/gtkcontainer.c:3288
#11 0x00007fcb7c287264 in gtk_container_focus (widget=0x559ad7bb3370, direction=GTK_DIR_TAB_FORWARD) at ././gtk/gtkcontainer.c:2809
#12 0x00007fcb7c34d66c in _gtk_marshal_BOOLEAN__ENUM (closure=0x559ad7b52170, return_value=0x7ffccedd9460, n_param_values=<optimized out>, param_values=0x7ffccedd94c0, invocation_hint=<optimized out>, marshal_data=<optimized out>) at ././gtk/gtkmarshalers.c:301
#13 0x00007fcb7aa7bd15 in g_closure_invoke () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#14 0x00007fcb7aa8e85d in () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#15 0x00007fcb7aa96b5f in g_signal_emit_valist () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#16 0x00007fcb7aa9749f in g_signal_emit () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#17 0x00007fcb7c49ed3a in gtk_widget_child_focus (widget=widget@entry=0x559ad7bb3370, direction=direction@entry=GTK_DIR_TAB_FORWARD) at ././gtk/gtkwidget.c:10998
#18 0x0000559ad61ad8ba in panel_applet_register (applet=0x559ad7bb3370, panel=panel@entry=0x559ad7ca52e0, type=type@entry=PANEL_OBJECT_APPLET, id=id@entry=0x559ad7d16750 "show-desktop", settings=settings@entry=0x559ad7c6f4d0, data=data@entry=0x559ad7bb3370, data_destroy=0x0) at applet.c:959
#19 0x0000559ad61b8528 in _panel_applet_frame_activated (frame=0x559ad7bb3370, frame_act=0x559ad7ab24c0, error=<optimized out>) at panel-applet-frame.c:597
#20 0x0000559ad61d7058 in gp_applet_manager_load_applet (manager=<optimized out>, iid=<optimized out>, frame_act=0x559ad7ab24c0) at gp-applet-manager.c:289
#21 0x0000559ad61b88c7 in panel_applet_frame_load_helper (settings=0x559ad7c6f4d0, id=0x559ad7d296e0 "show-desktop", panel=0x559ad7ca52e0, iid=0x559ad7b405e0 "wncklet::show-desktop") at panel-applet-frame.c:833
#22 0x0000559ad61b88c7 in panel_applet_frame_load (panel_widget=0x559ad7ca52e0, id=0x559ad7d296e0 "show-desktop", settings=0x559ad7c6f4d0)
at panel-applet-frame.c:864
#23 0x0000559ad61d634d in panel_object_loader_idle_handler (dummy=<optimized out>) at panel-object-loader.c:202
#24 0x00007fcb7a7a228a in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007fcb7a7a2640 in () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007fcb7a7a2962 in g_main_loop_run () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007fcb7c34b3e5 in gtk_main () at ././gtk/gtkmain.c:1312
#28 0x0000559ad61a1a2a in main (argc=<optimized out>, argv=<optimized out>) at main.c:205
