Comment 2 for bug 819812

StacktraceTop:
 g_variant_unref (value=0x0) at /build/buildd/glib2.0-2.29.14/./glib/gvariant-core.c:617
 g_settings_get_boolean (settings=<value optimized out>, key=<value optimized out>) at /build/buildd/glib2.0-2.29.14/./gio/gsettings.c:1988
 maybe_show_status_icon (manager=0x1da9680) at gsd-a11y-keyboard-manager.c:445
 g_closure_invoke (closure=0x1e88740, return_value=0x0, n_param_values=2, param_values=0x1eb2500, invocation_hint=<value optimized out>) at /build/buildd/glib2.0-2.29.14/./gobject/gclosure.c:773
 signal_emit_unlocked_R (node=<value optimized out>, detail=1205, instance=0x7f1be000b630, emission_return=0x0, instance_and_params=0x1eb2500) at /build/buildd/glib2.0-2.29.14/./gobject/gsignal.c:3271