1 error[E0072]: recursive type `f::E` has infinite size
2 --> $DIR/infinite-recursive-type-impl-trait.rs:2:5
7 | - recursive without indirection
9 help: insert some indirection (e.g., a `Box`, `Rc`, or `&`) to break the cycle
14 error: aborting due to previous error
16 For more information about this error, try `rustc --explain E0072`.