StacktraceTop: g_type_check_instance_cast (type_instance=0x92870d8, iface_type=153927760) at /build/buildd/glib2.0-2.29.10/./gobject/gtype.c:3977 gtk_image_menu_item_forall (container=0x92870d8, include_internals=1, callback=0xb74b0c30 <gtk_grab_notify_foreach>, callback_data=0xbf212274) at /build/buildd/gtk+3.0-3.1.8/./gtk/gtkimagemenuitem.c:634 gtk_container_forall (container=0x92870d8, callback=0xb74b0c30 <gtk_grab_notify_foreach>, callback_data=0xbf212274) at /build/buildd/gtk+3.0-3.1.8/./gtk/gtkcontainer.c:2031 gtk_grab_notify_foreach (child=0x92870d8, data=0xbf212274) at /build/buildd/gtk+3.0-3.1.8/./gtk/gtkmain.c:2099 gtk_menu_shell_forall (container=0x92cb088, include_internals=1, callback=0xb74b0c30 <gtk_grab_notify_foreach>, callback_data=0xbf212274) at /build/buildd/gtk+3.0-3.1.8/./gtk/gtkmenushell.c:1248
StacktraceTop: check_instance_ cast (type_instance= 0x92870d8, iface_type= 153927760) at /build/ buildd/ glib2.0- 2.29.10/ ./gobject/ gtype.c: 3977 menu_item_ forall (container= 0x92870d8, include_ internals= 1, callback=0xb74b0c30 <gtk_grab_ notify_ foreach> , callback_ data=0xbf212274 ) at /build/ buildd/ gtk+3.0- 3.1.8/. /gtk/gtkimageme nuitem. c:634 forall (container= 0x92870d8, callback=0xb74b0c30 <gtk_grab_ notify_ foreach> , callback_ data=0xbf212274 ) at /build/ buildd/ gtk+3.0- 3.1.8/. /gtk/gtkcontain er.c:2031 notify_ foreach (child=0x92870d8, data=0xbf212274) at /build/ buildd/ gtk+3.0- 3.1.8/. /gtk/gtkmain. c:2099 shell_forall (container= 0x92cb088, include_ internals= 1, callback=0xb74b0c30 <gtk_grab_ notify_ foreach> , callback_ data=0xbf212274 ) at /build/ buildd/ gtk+3.0- 3.1.8/. /gtk/gtkmenushe ll.c:1248
g_type_
gtk_image_
gtk_container_
gtk_grab_
gtk_menu_