Comment 2 for bug 1047420

StacktraceTop:
 _M_grab (__alloc2=..., __alloc1=..., this=<optimized out>) at /build/buildd/gcc-4.7-4.7.1/build/x86_64-linux-gnu/libstdc++-v3/include/bits/basic_string.h:226
 std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string (this=0x7fff280a7d30, __str=...) at /build/buildd/gcc-4.7-4.7.1/build/x86_64-linux-gnu/libstdc++-v3/include/bits/basic_string.tcc:175
 operator() (this=<optimized out>) at /usr/include/Nux-3.0/NuxCore/Property-inl.h:87
 operator() (data=<optimized out>, this=0x404a940) at /build/buildd/unity-6.4.0/dash/CoverflowResultView.cpp:168
 std::_Function_handler<void(_GVariant*), unity::dash::CoverflowResultView::Impl::Impl(unity::dash::CoverflowResultView*)::<lambda(GVariant*)> >::_M_invoke(const std::_Any_data &, _GVariant *) (__functor=..., __args#0=<optimized out>) at /usr/include/c++/4.6/functional:1778