1 error: `async` is a keyword in the 2018 edition
2 --> $DIR/async-ident-allowed.rs:9:9
5 | ^^^^^ help: you can use a raw identifier to stay compatible: `r#async`
7 note: lint level defined here
8 --> $DIR/async-ident-allowed.rs:3:9
10 LL | #![deny(rust_2018_compatibility)]
11 | ^^^^^^^^^^^^^^^^^^^^^^^
12 = note: #[deny(keyword_idents)] implied by #[deny(rust_2018_compatibility)]
13 = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2018 edition!
14 = note: for more information, see issue #49716 <https://github.com/rust-lang/rust/issues/49716>
16 error: aborting due to previous error