Spin-off issue from: https://d.puremagic.com/issues/show_bug.cgi?id=5363#c4

Reduced test case:

struct A
{
    B b;
    alias b this;
}

struct B
{
    static struct Value {}
    Value value;
    alias value this;

    void foo(ref const B rhs)
    {
    }
}

void main()
{
    A a;
    B b;
    b.foo(a);  // line 22
}

test.d(22): Error: B(a.b.value) is not an lvalue