Comment 2 for bug 1013898

StacktraceTop:
 g_type_value_table_peek (type=type@entry=3073924368) at /build/buildd/glib2.0-2.33.1/./gobject/gtype.c:4170
 g_value_init (value=value@entry=0xbf953278, g_type=g_type@entry=3073924368) at /build/buildd/glib2.0-2.33.1/./gobject/gvalue.c:175
 g_signal_emit_valist (instance=instance@entry=0x9752890, signal_id=signal_id@entry=32, detail=detail@entry=0, var_args=var_args@entry=0xbf9533cc "\305\274=\267\240Yq\t\034\064\225\277\230\\t\t\364\377H\267\020\342z\t\364\277d\267\020\342z\t\004\272[\267") at /build/buildd/glib2.0-2.33.1/./gobject/gsignal.c:3199
 g_signal_emit (instance=0x9752890, signal_id=32, detail=0) at /build/buildd/glib2.0-2.33.1/./gobject/gsignal.c:3352
 actually_do_call (client=<optimized out>, connection=<optimized out>, name_owner=0x0, call_type=CALL_TYPE_NAME_VANISHED) at /build/buildd/glib2.0-2.33.1/./gio/gdbusnamewatching.c:164