error[E0072]: recursive type `Rec` has infinite size
  --> $DIR/infinite-alias.rs:7:1
   |
LL | struct Rec(Wrapper<Rec>);
   | ^^^^^^^^^^ ------------ recursive without indirection
   |
help: insert some indirection (e.g., a `Box`, `Rc`, or `&`) to break the cycle
   |
LL | struct Rec(Box<Wrapper<Rec>>);
   |            ++++            +

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0072`.