error[E0277]: the trait bound `dyn Send: Trait` is not satisfied
  --> $DIR/unsized_coercion3.rs:13:17
   |
LL |         let x = hello();
   |                 ^^^^^^^ the trait `Trait` is not implemented for `dyn Send`
   |
   = help: the trait `Trait` is implemented for `u32`

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0277`.