| warning: the feature `async_fn_in_trait` is incomplete and may not be safe to use and/or cause compiler crashes |
| --> $DIR/object-safety.rs:3:12 |
| | |
| LL | #![feature(async_fn_in_trait)] |
| | ^^^^^^^^^^^^^^^^^ |
| | |
| = note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information |
| = note: `#[warn(incomplete_features)]` on by default |
| |
| error[E0038]: the trait `Foo` cannot be made into an object |
| --> $DIR/object-safety.rs:11:12 |
| | |
| LL | let x: &dyn Foo = todo!(); |
| | ^^^^^^^^ `Foo` cannot be made into an object |
| | |
| note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety> |
| --> $DIR/object-safety.rs:7:14 |
| | |
| LL | trait Foo { |
| | --- this trait cannot be made into an object... |
| LL | async fn foo(&self); |
| | ^^^ ...because method `foo` is `async` |
| = help: consider moving `foo` to another trait |
| |
| error: aborting due to previous error; 1 warning emitted |
| |
| For more information about this error, try `rustc --explain E0038`. |
