error[E0277]: the trait bound `(): Bar` is not satisfied
  --> $DIR/impl-trait-return-trailing-semicolon.rs:9:13
   |
LL | fn foo() -> impl Bar {
   |             ^^^^^^^^ the trait `Bar` is not implemented for `()`
LL |
LL |     5;
   |     -- help: remove this semicolon
   |     |
   |     this expression has type `{integer}`, which implements `Bar`

error[E0277]: the trait bound `(): Bar` is not satisfied
  --> $DIR/impl-trait-return-trailing-semicolon.rs:15:13
   |
LL | fn bar() -> impl Bar {
   |             ^^^^^^^^ the trait `Bar` is not implemented for `()`
   |
   = help: the following other types implement trait `Bar`:
             Qux
             i32

error: aborting due to 2 previous errors

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