error[E0774]: `derive` may only be applied to `struct`s, `enum`s and `union`s
  --> $DIR/issue-43023.rs:4:5
   |
LL |       #[derive(Debug)]
   |       ^^^^^^^^^^^^^^^^ not applicable here
LL | /     fn f() {
LL | |         file!();
LL | |     }
   | |_____- not a `struct`, `enum` or `union`

error[E0774]: `derive` may only be applied to `struct`s, `enum`s and `union`s
  --> $DIR/issue-43023.rs:11:5
   |
LL |     #[derive(Debug)]
   |     ^^^^^^^^^^^^^^^^ not applicable here
LL |     fn f();
   |     ------- not a `struct`, `enum` or `union`

error[E0774]: `derive` may only be applied to `struct`s, `enum`s and `union`s
  --> $DIR/issue-43023.rs:16:5
   |
LL |     #[derive(Debug)]
   |     ^^^^^^^^^^^^^^^^ not applicable here
LL |     type F;
   |     ------- not a `struct`, `enum` or `union`

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0774`.