error[E0746]: return type cannot have an unboxed trait object
  --> $DIR/E0746.rs:8:13
   |
LL | fn foo() -> dyn Trait { Struct }
   |             ^^^^^^^^^ doesn't have a size known at compile-time
   |
   = note: for information on `impl Trait`, see <https://doc.rust-lang.org/book/ch10-02-traits.html#returning-types-that-implement-traits>
help: use `impl Trait` as the return type, as all return paths are of type `Struct`, which implements `Trait`
   |
LL | fn foo() -> impl Trait { Struct }
   |             ~~~~~~~~~~

error[E0746]: return type cannot have an unboxed trait object
  --> $DIR/E0746.rs:11:13
   |
LL | fn bar() -> dyn Trait {
   |             ^^^^^^^^^ doesn't have a size known at compile-time
   |
   = note: for information on `impl Trait`, see <https://doc.rust-lang.org/book/ch10-02-traits.html#returning-types-that-implement-traits>
help: use `impl Trait` as the return type, as all return paths are of type `{integer}`, which implements `Trait`
   |
LL | fn bar() -> impl Trait {
   |             ~~~~~~~~~~

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0746`.