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

   1 error[E0038]: the trait `Trait` cannot be made into an object
   2   --> $DIR/E0038.rs:5:20
   3    |
   4 LL | fn call_foo(x: Box<dyn Trait>) {
   5    |                    ^^^^^^^^^ `Trait` cannot be made into an object
   6    |
   7 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>
   8   --> $DIR/E0038.rs:2:22
   9    |
  10 LL | trait Trait {
  11    |       ----- this trait cannot be made into an object...
  12 LL |     fn foo(&self) -> Self;
  13    |                      ^^^^ ...because method `foo` references the `Self` type in its return type
  14    = help: consider moving `foo` to another trait
  15
  16 error: aborting due to previous error
  17
  18 For more information about this error, try `rustc --explain E0038`.