`this` and nested structs

[Mike Franklin]

Consider the following code:

---
struct S
{
     // intentionally not `static`
     struct SS
     {
         int y() { return x; }  // Error: need `this` for `x` of 
type `int`
     }

     int x;
     SS ss;
}

void main()
{
     S s;
     s.ss.y();
}
---

If I change `return x;` to `return this.x;` then of course it 
emits the following error:

Error: no property `x` for type `SS`

My understanding is that `SS` should have a context pointer to an 
instance of `S`, but how do I navigate the members of `S` and 
`SS`.  Is this a bug?

Thanks,
Mike

My understanding is that nested structs have an implicit context 
pointer to their containing scope.