| error[E0277]: the size for values of type `impl Trait + ?Sized` cannot be known at compilation time | |
| --> $DIR/unsized_coercion3.rs:15:32 | |
| | | |
| LL | let y: Box<dyn Send> = x; | |
| | ^ doesn't have a size known at compile-time | |
| | | |
| = help: the trait `Sized` is not implemented for `impl Trait + ?Sized` | |
| = note: required for the cast from `Box<impl Trait + ?Sized>` to `Box<dyn Send>` | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0277`. |