| error[E0038]: the trait `Foo` is not dyn compatible |
| --> $DIR/issue-71659.rs:33:17 |
| | |
| LL | let x: &dyn Foo = &[]; |
| | ^^^ `Foo` is not dyn compatible |
| | |
| note: for a trait to be dyn compatible it needs to allow building a vtable |
| for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility> |
| --> $SRC_DIR/core/src/marker.rs:LL:COL |
| | |
| = note: ...because it opted out of dyn-compatibility |
| | |
| ::: $DIR/issue-71659.rs:29:11 |
| | |
| LL | pub trait Foo: CastTo<[i32]> {} |
| | --- this trait is not dyn compatible... |
| = help: only type `[i32; 0]` implements `Foo` within this crate; consider using it directly instead. |
| = note: `Foo` may be implemented in other crates; if you want to support your users passing their own types here, you can't refer to a specific type |
| |
| error: aborting due to 1 previous error |
| |
| For more information about this error, try `rustc --explain E0038`. |
