1error[E0733]: recursion in an `async fn` requires boxing 2 --> $DIR/recursive-async-impl-trait-type.rs:5:40 3 | 4LL | async fn recursive_async_function() -> () { 5 | ^^ recursive `async fn` 6 | 7 = note: a recursive `async fn` must be rewritten to return a boxed `dyn Future` 8 = note: consider using the `async_recursion` crate: https://crates.io/crates/async_recursion 9 10error: aborting due to previous error 11 12For more information about this error, try `rustc --explain E0733`. 13