error[E0308]: mismatched types
  --> $DIR/issue-82446.rs:11:9
   |
LL |         val
   |         ^^^ expected struct `Box`, found reference
   |
   = note: expected struct `Box<(dyn MyTrait + 'static)>`
           found reference `&Box<(dyn MyTrait + 'static)>`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0308`.