Comment 2 for bug 1238063

StacktraceTop:
 operator() (__args#1=<optimized out>, __args#0=@0x18b1ef9: 249, this=0x18b1f00) at /usr/include/c++/4.8/functional:2468
 nux::Property<bool>::Set (this=0x18b1ee8, value=@0x7fffa70c489f: false) at /usr/include/Nux-4.0/NuxCore/Property-inl.h:106
 operator= (value=@0x7fffa70c489f: false, this=<optimized out>) at /usr/include/Nux-4.0/NuxCore/Property-inl.h:76
 operator() (__closure=0x1d292e0) at /build/buildd/unity-7.1.1+13.10.20131004/launcher/EdgeBarrierController.cpp:432
 std::_Function_handler<bool(), unity::ui::EdgeBarrierController::Impl::BarrierRelease(unity::ui::PointerBarrierWrapper*, int)::__lambda3>::_M_invoke(const std::_Any_data &) (__functor=...) at /usr/include/c++/4.8/functional:2057