error[E0277]: the trait bound `fn() -> Pin + 'static)>> {target_feature}: AsyncFn<()>` is not satisfied --> $DIR/fn-exception-target-features.rs:16:10 | LL | test(target_feature); | ---- ^^^^^^^^^^^^^^ the trait `AsyncFn<()>` is not implemented for fn item `fn() -> Pin + 'static)>> {target_feature}` | | | required by a bound introduced by this call | note: required by a bound in `test` --> $DIR/fn-exception-target-features.rs:13:17 | LL | fn test(f: impl async Fn()) {} | ^^^^^^^^^^ required by this bound in `test` error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0277`.