error[E0038]: the trait `Bar` cannot be made into an object
  --> $DIR/object-safety-sized.rs:12:31
   |
LL | fn make_bar<T:Bar>(t: &T) -> &dyn Bar {
   |                               ^^^^^^^ `Bar` cannot be made into an object
   |
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>
  --> $DIR/object-safety-sized.rs:8:13
   |
LL | trait Bar : Sized {
   |       ---   ^^^^^ ...because it requires `Self: Sized`
   |       |
   |       this trait cannot be made into an object...

error: aborting due to 1 previous error

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