1 error[E0038]: the trait `A` cannot be made into an object
2 --> $DIR/wf-object-safe.rs:9:13
5 | - this trait cannot be made into an object...
6 LL | fn foo(&self, _x: &Self);
7 | ----- ...because method `foo` references the `Self` type in this parameter
10 | ^^^^^^ the trait `A` cannot be made into an object
12 = help: consider moving `foo` to another trait
14 error: aborting due to previous error
16 For more information about this error, try `rustc --explain E0038`.