src/test/ui/issues/issue-81885.stderr

   1 error[E0121]: the type placeholder `_` is not allowed within types on item signatures
   2   --> $DIR/issue-81885.rs:1:22
   3    |
   4 LL | const TEST4: fn() -> _ = 42;
   5    |                      ^ not allowed in type signatures
   6
   7 error[E0121]: the type placeholder `_` is not allowed within types on item signatures
   8   --> $DIR/issue-81885.rs:6:26
   9    |
  10 LL |     const TEST5: fn() -> _ = 42;
  11    |                          ^ not allowed in type signatures
  12
  13 error: aborting due to 2 previous errors
  14
  15 For more information about this error, try `rustc --explain E0121`.