error[E0277]: the trait bound `std::boxed::Box<dyn Map<isize, isize>>: Map<usize, isize>` is not satisfied
- --> $DIR/map-types.rs:17:37
+ --> $DIR/map-types.rs:17:41
|
-LL | let y: Box<Map<usize, isize>> = Box::new(x);
- | ^^^^^^^^^^^ the trait `Map<usize, isize>` is not implemented for `std::boxed::Box<dyn Map<isize, isize>>`
+LL | let y: Box<dyn Map<usize, isize>> = Box::new(x);
+ | ^^^^^^^^^^^ the trait `Map<usize, isize>` is not implemented for `std::boxed::Box<dyn Map<isize, isize>>`
|
= note: required for the cast to the object type `dyn Map<usize, isize>`