error[E0308]: mismatched types --> $DIR/cross-borrow-trait.rs:10:26 | LL | let _y: &dyn Trait = x; | ---------- ^ expected `&dyn Trait`, found `Box` | | | expected due to this | = note: expected reference `&dyn Trait` found struct `Box` error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0308`.