error[E0599]: the method `clone` exists for struct `Foo`, but its trait bounds were not satisfied --> $DIR/deriving-with-repr-packed-2.rs:18:11 | LL | pub struct Foo(T, T, T); | ----------------- | | | method `clone` not found for this struct | doesn't satisfy `Foo: Clone` LL | LL | struct NonCopy; | -------------- | | | doesn't satisfy `NonCopy: Clone` | doesn't satisfy `NonCopy: Copy` ... LL | _ = x.clone(); | ^^^^^ method cannot be called on `Foo` due to unsatisfied trait bounds | note: the following trait bounds were not satisfied: `NonCopy: Clone` `NonCopy: Copy` --> $DIR/deriving-with-repr-packed-2.rs:5:16 | LL | #[derive(Copy, Clone, Default, PartialEq, Eq)] | ^^^^^ unsatisfied trait bound introduced in this `derive` macro help: consider annotating `NonCopy` with `#[derive(Clone, Copy)]` | LL + #[derive(Clone, Copy)] LL | struct NonCopy; | error: aborting due to previous error For more information about this error, try `rustc --explain E0599`.