error: this must repeat at least once
  --> $DIR/issue-61033-1.rs:4:34
   |
LL |     ($x:ident, $($tt:tt)*) => { $($tt)+ }
   |                                  ^^^^^

error[E0308]: mismatched types
  --> $DIR/issue-61033-1.rs:9:33
   |
LL |     let _recovery_witness: () = 0;
   |                            --   ^ expected `()`, found integer
   |                            |
   |                            expected due to this

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0308`.