[Issue 24482] Recursive alias out of order fails to compile with a misleading error message.

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24482

--- Comment #2 from basile-z <b2.temp at gmx.com> ---
Moving decls does not solve anything, just try

```
struct Array(E) { E e;}
struct Enum(T) {T t;}
struct Object {NodeArray values;}
alias NodeArray = Array!Node;
alias Node = Enum!(Object);    
```

The point is that at some point you must know the size of a member. When the
member is a pointer you can guess the size without knowing the actual pointee
type size. Might be zero, might be 3 Billions, but in fine it's a pointer so
let's see that later ;)

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