1 error[E0038]: the trait `Trait` cannot be made into an object
4 LL | fn foo(&self) -> Self;
5 | --- method `foo` references the `Self` type in its parameters or return type
7 LL | fn call_foo(x: Box<dyn Trait>) {
8 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Trait` cannot be made into an object
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0038`.