error[E0277]: the trait bound `&Baz: Happy` is not satisfied
  --> $DIR/trait-suggest-deferences-multiple-0.rs:34:9
   |
LL | fn foo<T>(_: T) where T: Happy {}
   |                          ----- required by this bound in `foo`
...
LL |     foo(&baz);
   |         ^^^^
   |         |
   |         the trait `Happy` is not implemented for `&Baz`
   |         help: consider adding dereference here: `&***baz`

error: aborting due to previous error

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