Comment 2 for bug 1218811

StacktraceTop:
 ?? ()
 ?? ()
 _g_closure_invoke_va (closure=0x1c15a80, return_value=0x0, instance=0x1b5b340, args=0x7fffdc28caa8, n_params=0, param_types=0x0) at /build/buildd/glib2.0-2.37.6/./gobject/gclosure.c:840
 g_signal_emit_valist (instance=0x1b5b340, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args@entry=0x7fffdc28caa8) at /build/buildd/glib2.0-2.37.6/./gobject/gsignal.c:3234
 g_signal_emit (instance=instance@entry=0x1b5b340, signal_id=<optimized out>, detail=detail@entry=0) at /build/buildd/glib2.0-2.37.6/./gobject/gsignal.c:3382