1error[E0599]: the method `clone` exists for struct `Box<R>`, but its trait bounds were not satisfied 2 --> $DIR/unique-pinned-nocopy.rs:12:16 3 | 4LL | struct R { 5 | -------- doesn't satisfy `R: Clone` 6... 7LL | let _j = i.clone(); 8 | ^^^^^ method cannot be called on `Box<R>` due to unsatisfied trait bounds 9 | 10 ::: $SRC_DIR/alloc/src/boxed.rs:LL:COL 11 | 12LL | / pub struct Box< 13LL | | T: ?Sized, 14LL | | #[unstable(feature = "allocator_api", issue = "32838")] A: Allocator = Global, 15LL | | >(Unique<T>, A); 16 | |________________- doesn't satisfy `Box<R>: Clone` 17 | 18 = note: the following trait bounds were not satisfied: 19 `R: Clone` 20 which is required by `Box<R>: Clone` 21 = help: items from traits can only be used if the trait is implemented and in scope 22 = note: the following trait defines an item `clone`, perhaps you need to implement it: 23 candidate #1: `Clone` 24help: consider annotating `R` with `#[derive(Clone)]` 25 | 26LL | #[derive(Clone)] 27 | 28 29error: aborting due to previous error 30 31For more information about this error, try `rustc --explain E0599`. 32