Version-Release number of selected component:
gnome-shell-3.17.92-1.fc23

Additional info:
reporter:       libreport-2.6.2
backtrace_rating: 4
cmdline:        /usr/bin/gnome-shell
crash_function: gdk_window_get_state
executable:     /usr/bin/gnome-shell
global_pid:     23981
kernel:         4.2.0-300.fc23.x86_64+debug
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 gdk_window_get_state at gdkwindow.c:2731
 #1 gdk_x11_screen_monitor_has_fullscreen_window at gdkscreen-x11.c:397
 #2 gdk_x11_screen_get_monitor_workarea at gdkscreen-x11.c:429
 #3 gtk_window_guess_default_size at gtkwindow.c:6267
 #4 gtk_window_realize at gtkwindow.c:7049
 #9 gtk_widget_realize at gtkwidget.c:5403
 #11 gtk_socket_add_id at gtksocket.c:335
 #12 na_tray_manager_handle_dock_request at tray/na-tray-manager.c:302
 #13 na_tray_manager_window_filter at tray/na-tray-manager.c:472
 #14 gdk_event_apply_filters at gdkeventsource.c:81