Comment 2 for bug 945694

StacktraceTop:
 ?? ()
 operator() (this=<optimized out>) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:440
 nux::ROProperty<std::string>::operator std::string (this=<optimized out>) at /usr/include/Nux-2.0/NuxCore/Property-inl.h:142
 unity::dash::ResultViewGrid::OnKeyNavFocusChange (this=0xcb19240, area=<optimized out>, has_focus=<optimized out>, direction=nux::KEY_NAV_DOWN) at /build/buildd/unity-5.4.0/plugins/unityshell/src/ResultViewGrid.cpp:497
 sigc::internal::signal_emit3<void, nux::Area*, bool, nux::KeyNavDirection, sigc::nil>::emit (impl=<optimized out>, _A_a1=@0x7ffff3a9f8b8, _A_a2=@0x7ffff3a9f8cf, _A_a3=@0x7ffff3a9f88c) at /usr/include/sigc++-2.0/sigc++/signal.h:1501