| error[E0658]: `Wrap<&Struct, Struct>` cannot be used as the type of `self` without the `arbitrary_self_types` feature |
| --> $DIR/ref-self-async.rs:47:39 |
| LL | async fn wrap_ref_Self_Self(self: Wrap<&Self, Self>, f: &u8) -> &u8 { |
| = note: see issue #44874 <https://github.com/rust-lang/rust/issues/44874> for more information |
| = help: add `#![feature(arbitrary_self_types)]` to the crate attributes to enable |
| = help: consider changing to `self`, `&self`, `&mut self`, `self: Box<Self>`, `self: Rc<Self>`, `self: Arc<Self>`, or `self: Pin<P>` (where P is one of the previous types except `Self`) |
| error: aborting due to previous error |
| For more information about this error, try `rustc --explain E0658`. |
