#0  0x00007f03477cafd1 in g_type_check_instance_is_a () from /tmp/apport_sandbox_oF28Oa/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#1  0x0000561752544da5 in panel_profile_background_change_notify (settings=0x5617541d0260, key=0x561753e6e279 "image", toplevel=0x561753f9d3f0) at panel-profile.c:818
  813: 										PanelToplevel *toplevel)
  814: {
  815: 	PanelWidget     *panel_widget;
  816: 	PanelBackground *background;
  817: 
  818: 	if (toplevel == NULL || !PANEL_IS_TOPLEVEL (toplevel))
  819: 		return;
  820: 
  821: 	panel_widget = panel_toplevel_get_panel_widget (toplevel);
  822: 	if (panel_widget == NULL)
  823: 		return;
#2  0x00007f03477a6c25 in g_closure_invoke () from /tmp/apport_sandbox_oF28Oa/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#3  0x00007f03477b8c32 in ?? () from /tmp/apport_sandbox_oF28Oa/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#4  0x00007f03477c188c in g_signal_emit_valist () from /tmp/apport_sandbox_oF28Oa/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#5  0x00007f03477c1c6f in g_signal_emit () from /tmp/apport_sandbox_oF28Oa/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#6  0x00007f0347af13e6 in ?? () from /tmp/apport_sandbox_oF28Oa/usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#7  0x00007f0341699e18 in ffi_call_unix64 () from /tmp/apport_sandbox_oF28Oa/usr/lib/x86_64-linux-gnu/libffi.so.6
#8  0x00007f034169987a in ffi_call () from /tmp/apport_sandbox_oF28Oa/usr/lib/x86_64-linux-gnu/libffi.so.6
#9  0x00007f03477a793a in g_cclosure_marshal_generic_va () from /tmp/apport_sandbox_oF28Oa/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#10 0x00007f03477a6e54 in ?? () from /tmp/apport_sandbox_oF28Oa/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#11 0x00007f03477c1051 in g_signal_emit_valist () from /tmp/apport_sandbox_oF28Oa/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#12 0x00007f03477c1c6f in g_signal_emit () from /tmp/apport_sandbox_oF28Oa/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#13 0x00007f0347af1b68 in ?? () from /tmp/apport_sandbox_oF28Oa/usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#14 0x00007f0347aec76a in ?? () from /tmp/apport_sandbox_oF28Oa/usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#15 0x00007f03474cd1fa in g_main_context_dispatch () from /tmp/apport_sandbox_oF28Oa/lib/x86_64-linux-gnu/libglib-2.0.so.0
#16 0x00007f03474cd5b0 in ?? () from /tmp/apport_sandbox_oF28Oa/lib/x86_64-linux-gnu/libglib-2.0.so.0
#17 0x00007f03474cd8d2 in g_main_loop_run () from /tmp/apport_sandbox_oF28Oa/lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007f0349096185 in gtk_main () at ././gtk/gtkmain.c:1312
  [Error: gtkmain.c was not found in source tree]
#19 0x000056175250f756 in main (argc=<optimized out>, argv=<optimized out>) at main.c:168
  163: 	gtk_show_about_dialog(NULL,
  164: 		"program-name", _("Notification Area"),
  165: 		"authors", authors,
  166: 		//"comments", _(comments),
  167: 		"copyright", copyright,
  168: 		"documenters", documenters,
  169: 		"logo-icon-name", NOTIFICATION_AREA_ICON,
  170: 		"translator-credits", _("translator-credits"),
  171: 		"version", VERSION,
  172: 		NULL);
  173: }