1 error[E0072]: recursive type `f::E` has infinite size
2 --> $DIR/infinite-recursive-type-impl-trait.rs:2:5
5 | ^^^^^^ recursive type has infinite size
8 | - recursive without indirection
10 help: insert some indirection (e.g., a `Box`, `Rc`, or `&`) to make `f::E` representable
15 error: aborting due to previous error
17 For more information about this error, try `rustc --explain E0072`.