error[E0382]: use of moved value: `message`
  --> $DIR/liveness-use-after-send.rs:16:20
   |
LL |     send(ch, message);
   |              ------- value moved here
LL |     println!("{}", message); //~ ERROR use of moved value: `message`
   |                    ^^^^^^^ value used here after move
   |
   = note: move occurs because `message` has type `std::boxed::Box<isize>`, which does not implement the `Copy` trait

error: aborting due to previous error

For more information about this error, try `rustc --explain E0382`.