error[E0308]: mismatched types --> $DIR/suggest-missing-await.rs:12:14 | LL | take_u32(x) | -------- ^ expected `u32`, found future | | | arguments to this function are incorrect | note: calling an async function returns a future --> $DIR/suggest-missing-await.rs:12:14 | LL | take_u32(x) | ^ note: function defined here --> $DIR/suggest-missing-await.rs:3:4 | LL | fn take_u32(_x: u32) {} | ^^^^^^^^ ------- help: consider `await`ing on the `Future` | LL | take_u32(x.await) | ++++++ error[E0308]: mismatched types --> $DIR/suggest-missing-await.rs:22:5 | LL | dummy() | ^^^^^^^ expected `()`, found future | note: calling an async function returns a future --> $DIR/suggest-missing-await.rs:22:5 | LL | dummy() | ^^^^^^^ help: consider `await`ing on the `Future` | LL | dummy().await | ++++++ help: consider using a semicolon here | LL | dummy(); | + error[E0308]: `if` and `else` have incompatible types --> $DIR/suggest-missing-await.rs:35:9 | LL | let _x = if true { | ______________- LL | | dummy() | | ------- expected because of this LL | | LL | | } else { LL | | dummy().await | | ^^^^^^^^^^^^^ expected future, found `()` LL | | LL | | }; | |_____- `if` and `else` have incompatible types | = note: expected opaque type `impl Future` found unit type `()` help: consider `await`ing on the `Future` | LL | dummy().await | ++++++ error[E0308]: `match` arms have incompatible types --> $DIR/suggest-missing-await.rs:45:14 | LL | let _x = match 0usize { | ______________- LL | | 0 => dummy(), | | ------- this is found to be of type `impl Future` LL | | 1 => dummy(), | | ------- this is found to be of type `impl Future` LL | | 2 => dummy().await, | | ^^^^^^^^^^^^^ expected future, found `()` LL | | LL | | }; | |_____- `match` arms have incompatible types | = note: expected opaque type `impl Future` found unit type `()` help: consider `await`ing on the `Future` | LL ~ 0 => dummy().await, LL ~ 1 => dummy().await, | error[E0308]: mismatched types --> $DIR/suggest-missing-await.rs:53:9 | LL | let _x = match dummy() { | ------- this expression has type `impl Future` LL | () => {} | ^^ expected future, found `()` | = note: expected opaque type `impl Future` found unit type `()` help: consider `await`ing on the `Future` | LL | let _x = match dummy().await { | ++++++ error[E0308]: mismatched types --> $DIR/suggest-missing-await.rs:67:9 | LL | match dummy_result() { | -------------- this expression has type `impl Future>` ... LL | Ok(_) => {} | ^^^^^ expected future, found `Result<_, _>` | = note: expected opaque type `impl Future>` found enum `Result<_, _>` help: consider `await`ing on the `Future` | LL | match dummy_result().await { | ++++++ error[E0308]: mismatched types --> $DIR/suggest-missing-await.rs:69:9 | LL | match dummy_result() { | -------------- this expression has type `impl Future>` ... LL | Err(_) => {} | ^^^^^^ expected future, found `Result<_, _>` | = note: expected opaque type `impl Future>` found enum `Result<_, _>` help: consider `await`ing on the `Future` | LL | match dummy_result().await { | ++++++ error[E0308]: mismatched types --> $DIR/suggest-missing-await.rs:77:27 | LL | Some(do_async()).map(|()| {}); | ^^ | | | expected future, found `()` | expected due to this | = note: expected opaque type `impl Future` found unit type `()` error: aborting due to 8 previous errors For more information about this error, try `rustc --explain E0308`.