Description of problem:
Happened on boot of today's Rawhide Workstation live image. Does not happen on every boot - happened on one of three boots, for me. openQA ran into this a couple of times also.

https://kojipkgs.fedoraproject.org/compose/rawhide/Fedora-Rawhide-20160830.n.0/compose/Workstation/x86_64/iso/Fedora-Workstation-Live-x86_64-Rawhide-20160830.n.0.iso

Version-Release number of selected component:
gjs-1.45.4-1.fc25

Additional info:
reporter:       libreport-2.7.2
backtrace_rating: 4
cmdline:        gjs-console /usr/share/anaconda/gnome/fedora-welcome
crash_function: _gtk_settings_handle_event
executable:     /usr/bin/gjs-console
global_pid:     1908
kernel:         4.8.0-0.rc4.git0.1.fc26.x86_64
pkg_vendor:     Fedora Project
runlevel:       unknown
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 _gtk_settings_handle_event at gtksettings.c:2859
 #1 gtk_main_do_event at gtkmain.c:1666
 #2 _gdk_event_emit at gdkevents.c:73
 #7 g_main_context_iteration at gmain.c:3988
 #8 g_application_run at gapplication.c:2381
 #9 ffi_call_unix64 at ../src/x86/unix64.S:76
 #10 ffi_call at ../src/x86/ffi64.c:525
 #11 gjs_invoke_c_function at gi/function.cpp:999
 #12 function_call at gi/function.cpp:1323
 #13 js::CallJSNative at /usr/src/debug/mozjs-24.2.0/js/src/jscntxtinlines.h:321