error[E0038]: the trait `Trait` cannot be made into an object
  --> $DIR/wf-convert-unsafe-trait-obj.rs:16:25
   |
LL | trait Trait: Sized {}
   |       -----  ----- ...because it requires `Self: Sized`
   |       |
   |       this trait cannot be made into an object...
...
LL |     let t: &dyn Trait = &S;
   |                         ^^ the trait `Trait` cannot be made into an object
   |
   = note: required because of the requirements on the impl of `CoerceUnsized<&dyn Trait>` for `&S`
   = note: required by cast to type `&dyn Trait`

error[E0038]: the trait `Trait` cannot be made into an object
  --> $DIR/wf-convert-unsafe-trait-obj.rs:17:17
   |
LL | trait Trait: Sized {}
   |       -----  ----- ...because it requires `Self: Sized`
   |       |
   |       this trait cannot be made into an object...
...
LL |     takes_trait(&S);
   |                 ^^ the trait `Trait` cannot be made into an object
   |
   = note: required because of the requirements on the impl of `CoerceUnsized<&dyn Trait>` for `&S`
   = note: required by cast to type `&dyn Trait`

error[E0038]: the trait `Trait` cannot be made into an object
  --> $DIR/wf-convert-unsafe-trait-obj.rs:15:5
   |
LL | trait Trait: Sized {}
   |       -----  ----- ...because it requires `Self: Sized`
   |       |
   |       this trait cannot be made into an object...
...
LL |     &S as &dyn Trait;
   |     ^^ the trait `Trait` cannot be made into an object
   |
   = note: required because of the requirements on the impl of `CoerceUnsized<&dyn Trait>` for `&S`
   = note: required by cast to type `&dyn Trait`

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0038`.