moveToGC

[JG via Digitalmars-d-learn]

The following compiles with dmd but not with ldc on run.dlang.io. 
Am I doing something wrong?

import core.memory;

    void main()
    {

        struct S
        {
            int x;
            this(this) @disable;
            ~this() @safe pure nothrow @nogc {}
        }

        S* p;

        // rvalue
        p = moveToGC(S(123));
        assert(p.x == 123);

        // lvalue
        auto lval = S(456);
        p = moveToGC(lval);
        assert(p.x == 456);
        assert(lval.x == 0);


    }