error[E0404]: expected trait, found builtin type `usize`
  --> $DIR/suggestion-trait-object-issue-139174.rs:3:36
   |
LL | fn f<'a>(x: Box<dyn Fn() -> Option<usize + 'a>>) -> usize {
   |                                    ^^^^^ not a trait

error[E0404]: expected trait, found builtin type `usize`
  --> $DIR/suggestion-trait-object-issue-139174.rs:9:32
   |
LL | fn create_adder<'a>(x: i32) -> usize + 'a {
   |                                ^^^^^ not a trait

error[E0404]: expected trait, found builtin type `usize`
  --> $DIR/suggestion-trait-object-issue-139174.rs:16:8
   |
LL |     x: usize + 'a,
   |        ^^^^^ not a trait

error[E0782]: expected a type, found a trait
  --> $DIR/suggestion-trait-object-issue-139174.rs:3:36
   |
LL | fn f<'a>(x: Box<dyn Fn() -> Option<usize + 'a>>) -> usize {
   |                                    ^^^^^^^^^^

error[E0782]: expected a type, found a trait
  --> $DIR/suggestion-trait-object-issue-139174.rs:9:32
   |
LL | fn create_adder<'a>(x: i32) -> usize + 'a {
   |                                ^^^^^^^^^^

error[E0782]: expected a type, found a trait
  --> $DIR/suggestion-trait-object-issue-139174.rs:16:8
   |
LL |     x: usize + 'a,
   |        ^^^^^^^^^^

error: aborting due to 6 previous errors

Some errors have detailed explanations: E0404, E0782.
For more information about an error, try `rustc --explain E0404`.