error: visibility `pub(crate)` is not followed by an item
  --> $DIR/pub-restricted-error-fn.rs:1:1
   |
LL | pub(crate) () fn foo() {}
   | ^^^^^^^^^^ the visibility
   |
   = help: you likely meant to define an item, e.g., `pub(crate) fn foo() {}`

error: expected item, found `(`
  --> $DIR/pub-restricted-error-fn.rs:1:12
   |
LL | pub(crate) () fn foo() {}
   |            ^ expected item
   |
   = note: for a full list of items that can appear in modules, see <https://doc.rust-lang.org/reference/items.html>

error: aborting due to 2 previous errors