error[E0308]: mismatched types --> $DIR/dont-suggest-missing-await.rs:14:18 | LL | take_u32(x) | -------- ^ expected `u32`, found future | | | arguments to this function are incorrect | note: calling an async function returns a future --> $DIR/dont-suggest-missing-await.rs:14:18 | LL | take_u32(x) | ^ note: function defined here --> $DIR/dont-suggest-missing-await.rs:5:4 | LL | fn take_u32(x: u32) {} | ^^^^^^^^ ------ help: consider `await`ing on the `Future` | LL | take_u32(x.await) | ++++++ error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0308`.