edition-keywords-2018-2018-expansion.stderr

error: expected identifier, found keyword `async`
  --> $DIR/edition-keywords-2018-2018-expansion.rs:8:5
   |
LL |     produces_async! {}
   |     ^^^^^^^^^^^^^^^^^^ expected identifier, found keyword
   |
   = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
help: you can escape reserved keywords to use them as identifiers
   |
LL | () => (pub fn r#async () { })
   |               ^^^^^^^

error: aborting due to previous error