error: expected `fn`, found `PUT_ANYTHING_YOU_WANT_HERE`
  --> $DIR/issue-68062-const-extern-fns-dont-need-fn-specifier.rs:5:25
   |
LL |     const extern "Rust" PUT_ANYTHING_YOU_WANT_HERE bug() -> usize { 1 }
   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `fn`

error: aborting due to previous error