1 error[E0038]: the trait `Trait` cannot be made into an object
4 LL | fn call_foo(x: Box<dyn Trait>) {
5 | ^^^^^^^^^^^^^^ `Trait` cannot be made into an object
7 = help: consider moving `foo` to another trait
8 note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
12 | ----- this trait cannot be made into an object...
13 LL | fn foo(&self) -> Self;
14 | ^^^^ ...because method `foo` references the `Self` type in its return type
16 error: aborting due to previous error
18 For more information about this error, try `rustc --explain E0038`.