error: repetition matches empty token tree
  --> $DIR/issue-42755.rs:14:7
   |
LL |     ($($p:vis)*) => {} //~ ERROR repetition matches empty token tree
   |       ^^^^^^^^

error[E0601]: `main` function not found in crate `issue_42755`
   |
   = note: consider adding a `main` function to `$DIR/issue-42755.rs`

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0601`.