Comment 2 for bug 859683

StacktraceTop:
 gcm_prefs_add_device (prefs=0x7fb79c540020, device=0x7fb79c5dbce0) at cc-color-panel.c:1689
 gcm_prefs_device_added_cb (client=<optimized out>, device=<optimized out>, prefs=0x7fb79c540020) at cc-color-panel.c:1810
 g_closure_invoke (closure=0x7fb79c599340, return_value=0x0, n_param_values=2, param_values=0x7fb79c4dda70, invocation_hint=<optimized out>) at /build/buildd/glib2.0-2.29.92/./gobject/gclosure.c:774
 signal_emit_unlocked_R (node=<optimized out>, detail=0, instance=0x7fb79c0bda10, emission_return=0x0, instance_and_params=0x7fb79c4dda70) at /build/buildd/glib2.0-2.29.92/./gobject/gsignal.c:3272
 g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=0x7fff26052598) at /build/buildd/glib2.0-2.29.92/./gobject/gsignal.c:3003