refPtr does not do assignment from autoPtr

Functionality to add/problem to solve

Assign autoPtr to a refPtr is not defined. Following code produces a sigsegv:

        autoPtr<labelList> ptr(new labelList(1, 1234));
        refPtr<labelList> ref;

        //- Does not work
        ref = ptr;

        ////- Works
        //ref = refPtr<labelList>(std::move(ptr));

        DebugVar(ptr.valid());
        DebugVar(ref.valid());
        DebugVar(ref());

Proposal

Have (stealing?) assignment from autoPtr