$ cargo run
   Compiling deref-example v0.1.0 (file:///projects/deref-example)
error[E0614]: type `MyBox<{integer}>` cannot be dereferenced
  --> src/main.rs:14:19
   |
14 |     assert_eq!(5, *y);
   |                   ^^

For more information about this error, try `rustc --explain E0614`.
error: could not compile `deref-example` due to previous error
