In file included from /usr/bin/../lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_pair.h:60:
/usr/bin/../lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/move.h:57:14: error: rvalue reference to type 'typename std::remove_reference<ObjectHeader *&>::type' (aka 'rubinius::ObjectHeader *') cannot bind to lvalue of type 'rubinius::ObjectHeader *'
    { return __t; }
             ^~~
/usr/bin/../lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/vector.tcc:302:7: note: in instantiation of function template specialization 'std::move<rubinius::ObjectHeader *&>' requested here
                                  _GLIBCXX_MOVE(*(this->_M_impl._M_finish
                                  ^
/usr/bin/../lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/move.h:61:33: note: expanded from macro '_GLIBCXX_MOVE'
#define _GLIBCXX_MOVE(_Tp) std::move(_Tp)
                                ^
/usr/bin/../lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_vector.h:741:4: note: in instantiation of function template specialization 'std::vector<rubinius::ObjectHeader *, std::allocator<rubinius::ObjectHeader *> >::_M_insert_aux<rubinius::ObjectHeader *const &>' requested here
          _M_insert_aux(end(), __x);
          ^
/tmp/ruby-build.20160331111839.17731/rubinius-3.20/machine/memory/managed.hpp:71:23: note: in instantiation of member function 'std::vector<rubinius::ObjectHeader *, std::allocator<rubinius::ObjectHeader *> >::push_back' requested here
      locked_objects_.push_back(obj);
                      ^