error[E0308]: `match` arms have incompatible types --> $DIR/issue-81839.rs:11:14 | LL | / match num { LL | | 1 => { LL | | cx.answer_str("hi"); | | -------------------- | | | | | | | help: consider removing this semicolon | | this is found to be of type `()` LL | | } LL | | _ => cx.answer_str("hi"), | | ^^^^^^^^^^^^^^^^^^^ expected `()`, found opaque type LL | | } | |_____- `match` arms have incompatible types | note: while checking the return type of the `async fn` --> $DIR/auxiliary/issue-81839.rs:6:49 | LL | pub async fn answer_str(&self, _s: &str) -> Test { | ^^^^ checked the `Output` of this `async fn`, found opaque type = note: expected unit type `()` found opaque type `impl Future` error: aborting due to previous error For more information about this error, try `rustc --explain E0308`.