error[E0277]: the trait bound `NotClonableUpvar: Clone` is not satisfied in `{async closure@$DIR/not-clone-closure.rs:27:21: 27:34}` --> $DIR/not-clone-closure.rs:30:15 | LL | not_clone.clone(); | ^^^^^ unsatisfied trait bound | = help: within `{async closure@$DIR/not-clone-closure.rs:27:21: 27:34}`, the trait `Clone` is not implemented for `NotClonableUpvar` note: required because it's used within this closure --> $DIR/not-clone-closure.rs:27:21 | LL | let not_clone = async move || { | ^^^^^^^^^^^^^ help: consider annotating `NotClonableUpvar` with `#[derive(Clone)]` | LL + #[derive(Clone)] LL | struct NotClonableUpvar; | error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0277`.