$ cargo check Checking hello v0.1.0 (file:///projects/hello) error[E0382]: use of moved value: `receiver` --> src/lib.rs:26:42 | 21 | let (sender, receiver) = mpsc::channel(); | -------- move occurs because `receiver` has type `std::sync::mpsc::Receiver`, which does not implement the `Copy` trait ... 25 | for id in 0..size { | ----------------- inside of this loop 26 | workers.push(Worker::new(id, receiver)); | ^^^^^^^^ value moved here, in previous iteration of loop | note: consider changing this parameter type in method `new` to borrow instead if owning the value isn't necessary --> src/lib.rs:47:33 | 47 | fn new(id: usize, receiver: mpsc::Receiver) -> Worker { | --- in this method ^^^^^^^^^^^^^^^^^^^ this parameter takes ownership of the value For more information about this error, try `rustc --explain E0382`. error: could not compile `hello` (lib) due to 1 previous error