error[E0277]: the trait bound `#[target_features] fn() -> Pin + 'static)>> {target_feature}: AsyncFn()` is not satisfied --> $DIR/fn-exception-target-features.rs:15:10 | LL | test(target_feature); | ---- ^^^^^^^^^^^^^^ unsatisfied trait bound | | | required by a bound introduced by this call | = help: the trait `AsyncFn()` is not implemented for fn item `#[target_features] fn() -> Pin + 'static)>> {target_feature}` note: required by a bound in `test` --> $DIR/fn-exception-target-features.rs:12:17 | LL | fn test(f: impl AsyncFn()) {} | ^^^^^^^^^ required by this bound in `test` error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0277`.