error[E0599]: no method named `eat` found for type `std::boxed::Box<dyn noisy>` in the current scope
  --> $DIR/class-cast-to-trait.rs:63:8
   |
LL |   nyan.eat(); //~ ERROR no method named `eat` found
   |        ^^^

error: aborting due to previous error

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