Version-Release number of selected component:
gnome-shell-3.17.4-1.fc23

Additional info:
reporter:       libreport-2.6.2
backtrace_rating: 4
cmdline:        /usr/bin/gnome-shell
crash_function: meta_window_ungrab_all_keys
executable:     /usr/bin/gnome-shell
global_pid:     29915
kernel:         4.2.0-0.rc6.git0.2.fc23.x86_64+debug
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 meta_window_ungrab_all_keys at core/keybindings.c:1565
 #1 meta_display_end_grab_op at core/display.c:2006
 #2 meta_window_x11_client_message at x11/window-x11.c:2570
 #3 handle_other_xevent at x11/events.c:1483
 #4 meta_display_handle_xevent at x11/events.c:1745
 #5 xevent_filter at x11/events.c:1784
 #6 gdk_event_apply_filters at gdkeventsource.c:81
 #7 gdk_event_source_translate_event at gdkeventsource.c:195
 #8 _gdk_x11_display_queue_events at gdkeventsource.c:338
 #9 gdk_display_get_event at gdkdisplay.c:340

Potential duplicate: bug 1144416