Description of problem:
I think:
- lock screen
- power save
- unlock screen

Version-Release number of selected component:
gnome-shell-3.18.0-1.fc23

Additional info:
reporter:       libreport-2.6.2
backtrace_rating: 4
cmdline:        /usr/bin/gnome-shell --wayland --display-server
crash_function: g_hash_table_lookup_node
executable:     /usr/bin/gnome-shell
global_pid:     12479
kernel:         4.2.1-300.fc23.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 g_hash_table_lookup_node at ghash.c:373
 #1 g_hash_table_contains at ghash.c:1324
 #2 set_surface_is_on_output at wayland/meta-wayland-surface.c:950
 #7 wayland_output_destroy_notify at wayland/meta-wayland-outputs.c:116
 #8 g_hash_table_remove_all_nodes at ghash.c:548
 #10 g_hash_table_remove_all at ghash.c:1428
 #11 g_hash_table_destroy at ghash.c:1122
 #12 meta_wayland_compositor_update_outputs at wayland/meta-wayland-outputs.c:220
 #13 on_monitors_changed at wayland/meta-wayland-outputs.c:228
 #14 ffi_call_unix64 at ../src/x86/unix64.S:76