| error[E0038]: the trait `Expr` cannot be made into an object | |
| --> $DIR/object-safety-issue-22040.rs:12:23 | |
| | | |
| LL | elements: Vec<Box<dyn Expr + 'x>>, | |
| | ^^^^^^^^^^^^^ the trait `Expr` cannot be made into an object | |
| | | |
| = note: the trait cannot use `Self` as a type parameter in the supertraits or where-clauses | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0038`. |