Warning: copy constructor for class 'QV4::Property' when binding a reference to a temporary; was private [-Wbind-to-temporary-copy]

In file included from tst_qqmltranslation.cpp:47:
In file included from /Users/frederik/dev/qt5/qtbase/lib/QtQml.framework/Versions/5/Headers/5.3.0/QtQml/private/qqmlcompiler_p.h:58:
In file included from /Users/frederik/dev/qt5/qtbase/lib/QtQml.framework/Versions/5/Headers/5.3.0/QtQml/private/qqmlengine_p.h:58:
In file included from /Users/frederik/dev/qt5/qtbase/lib/QtQml.framework/Versions/5/Headers/5.3.0/QtQml/private/qqmltypeloader_p.h:73:
In file included from /Users/frederik/dev/qt5/qtbase/lib/QtQml.framework/Versions/5/Headers/5.3.0/QtQml/private/qv4script_p.h:46:
In file included from /Users/frederik/dev/qt5/qtbase/lib/QtQml.framework/Versions/5/Headers/5.3.0/QtQml/private/qv4functionobject_p.h:48:
/Users/frederik/dev/qt5/qtbase/lib/QtQml.framework/Versions/5/Headers/5.3.0/QtQml/private/qv4object_p.h:176:25: warning: C++98 requires an accessible
copy constructor for class 'QV4::Property' when binding a reference to a temporary; was private [-Wbind-to-temporary-copy]
insertMember(s, Property(*v), attributes);
^
/Users/frederik/dev/qt5/qtbase/lib/QtQml.framework/Versions/5/Headers/5.3.0/QtQml/private/qv4property_p.h:101:5: note: declared private here
Property(const Property &);
^
1 warning generated.