error[E0277]: `()` is not a future --> $DIR/issue-96555.rs:4:13 | LL | m::f1().await; | ------- ^^^^^ `()` is not a future | | | this call returns `()` | = help: the trait `Future` is not implemented for `()` = note: () must be a future or must implement `IntoFuture` to be awaited = note: required for `()` to implement `IntoFuture` help: remove the `.await` | LL - m::f1().await; LL + m::f1(); | help: alternatively, consider making `fn f1` asynchronous | LL | pub async fn f1() {} | +++++ error[E0277]: `()` is not a future --> $DIR/issue-96555.rs:5:13 | LL | m::f2().await; | ------- ^^^^^ `()` is not a future | | | this call returns `()` | = help: the trait `Future` is not implemented for `()` = note: () must be a future or must implement `IntoFuture` to be awaited = note: required for `()` to implement `IntoFuture` help: remove the `.await` | LL - m::f2().await; LL + m::f2(); | help: alternatively, consider making `fn f2` asynchronous | LL | pub(crate) async fn f2() {} | +++++ error[E0277]: `()` is not a future --> $DIR/issue-96555.rs:6:13 | LL | m::f3().await; | ------- ^^^^^ `()` is not a future | | | this call returns `()` | = help: the trait `Future` is not implemented for `()` = note: () must be a future or must implement `IntoFuture` to be awaited = note: required for `()` to implement `IntoFuture` help: remove the `.await` | LL - m::f3().await; LL + m::f3(); | help: alternatively, consider making `fn f3` asynchronous | LL | pub async | +++++ error: aborting due to 3 previous errors For more information about this error, try `rustc --explain E0277`.