Comment 2 for bug 957433

StacktraceTop:
 ?? ()
 g_cclosure_marshal_VOID__PARAM (closure=0x9c8bb90, return_value=0x0, n_param_values=2, param_values=0x9b39568, invocation_hint=0xbfbd57a0, marshal_data=0x0) at /build/buildd/glib2.0-2.31.20/./gobject/gmarshal.c:1042
 g_closure_invoke (closure=0x9c8bb90, return_value=0x0, n_param_values=2, param_values=0x9b39568, invocation_hint=0xbfbd57a0) at /build/buildd/glib2.0-2.31.20/./gobject/gclosure.c:777
 signal_emit_unlocked_R (node=0x9108fa0, detail=452, instance=0x9281e30, emission_return=0x0, instance_and_params=0x9b39568) at /build/buildd/glib2.0-2.31.20/./gobject/gsignal.c:3547
 g_signal_emit_valist (instance=0x9281e30, signal_id=1, detail=452, var_args=0xbfbd59f0 "0\036(\tP") at /build/buildd/glib2.0-2.31.20/./gobject/gsignal.c:3295