tests/ui/coroutine/gen_fn.none.stderr

   1 error: expected one of `#`, `async`, `const`, `default`, `extern`, `fn`, `pub`, `unsafe`, or `use`, found `gen`
   2   --> $DIR/gen_fn.rs:4:1
   3    |
   4 LL | gen fn foo() {}
   5    | ^^^ expected one of 9 possible tokens
   6
   7 error: aborting due to previous error
   8