error[E0191]: the value of the associated type `Item` in `Iterator` must be specified
  --> $DIR/trait-hidden-method.rs:4:33
   |
LL |     Box::new(1..=10) as Box<dyn Iterator>
   |                                 ^^^^^^^^ help: specify the associated type: `Iterator<Item = Type>`

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0191`.