error[E0599]: no method named `eat` found for struct `Box<dyn Noisy>` in the current scope
  --> $DIR/class-cast-to-trait.rs:53:8
   |
LL |   nyan.eat();
   |        ^^^ method not found in `Box<dyn Noisy>`

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0599`.