error[E0277]: the trait bound `&mut usize: Default` is not satisfied
  --> $DIR/suggest-adding-reference-to-trait-assoc-item.rs:13:9
   |
LL |     foo(Default::default());
   |         ^^^^^^^^^^^^^^^^^^ the trait `Default` is not implemented for `&mut usize`
   |
help: consider mutably borrowing here
   |
LL |     foo(&mut Default::default());
   |         ++++

error[E0277]: the trait bound `&usize: Default` is not satisfied
  --> $DIR/suggest-adding-reference-to-trait-assoc-item.rs:14:9
   |
LL |     bar(Default::default());
   |         ^^^^^^^^^^^^^^^^^^ the trait `Default` is not implemented for `&usize`
   |
help: consider borrowing here
   |
LL |     bar(&Default::default());
   |         +

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0277`.