src/test/ui/error-codes/E0038.stderr

   1 error[E0038]: the trait `Trait` cannot be made into an object
   2   --> $DIR/E0038.rs:5:1
   3    |
   4 LL |     fn foo(&self) -> Self;
   5    |        --- method `foo` references the `Self` type in its parameters or return type
   6 ...
   7 LL | fn call_foo(x: Box<dyn Trait>) {
   8    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Trait` cannot be made into an object
   9
  10 error: aborting due to previous error
  11
  12 For more information about this error, try `rustc --explain E0038`.