tests/ui/traits/issue-38404.stderr

   1 error[E0038]: the trait `B` cannot be made into an object
   2   --> $DIR/issue-38404.rs:3:15
   3    |
   4 LL | trait C<T>: A<dyn B<T, Output=usize>> {}
   5    |               ^^^^^^^^^^^^^^^^^^^^^^ `B` 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/issue-38404.rs:1:13
   9    |
  10 LL | trait A<T>: std::ops::Add<Self> + Sized {}
  11    |             ^^^^^^^^^^^^^^^^^^^ ...because it uses `Self` as a type parameter
  12 LL | trait B<T>: A<T> {}
  13    |       - this trait cannot be made into an object...
  14
  15 error: aborting due to previous error
  16
  17 For more information about this error, try `rustc --explain E0038`.