error[E0728]: `await` is only allowed inside `async` functions and blocks --> $DIR/issue-70594.rs:4:11 | LL | async fn fun() { | --- this is not `async` LL | [1; ().await]; | ^^^^^^ only allowed inside `async` functions and blocks error[E0744]: `.await` is not allowed in a `const` --> $DIR/issue-70594.rs:4:9 | LL | [1; ().await]; | ^^^^^^^^ error[E0744]: `.await` is not allowed in a `const` --> $DIR/issue-70594.rs:4:11 | LL | [1; ().await]; | ^^^^^^ error[E0277]: `()` is not a future --> $DIR/issue-70594.rs:4:11 | LL | [1; ().await]; | ^^^^^^ `()` is not a future | = help: the trait `Future` is not implemented for `()` = note: () must be a future or must implement `IntoFuture` to be awaited = note: required because of the requirements on the impl of `IntoFuture` for `()` help: remove the `.await` | LL - [1; ().await]; LL + [1; ()]; | error: aborting due to 4 previous errors Some errors have detailed explanations: E0277, E0728, E0744. For more information about an error, try `rustc --explain E0277`.