error[E0599]: the method `extend_from_slice` exists for mutable reference `&mut Vec<NoDerives>`, but its trait bounds were not satisfied
  --> $DIR/issue-91492.rs:4:9
   |
LL | pub struct NoDerives;
   | -------------------- doesn't satisfy `NoDerives: Clone`
LL | fn fun1(foo: &mut Vec<NoDerives>, bar: &[NoDerives]) {
LL |     foo.extend_from_slice(bar);
   |         ^^^^^^^^^^^^^^^^^
   |
   = note: the following trait bounds were not satisfied:
           `NoDerives: Clone`
help: consider annotating `NoDerives` with `#[derive(Clone)]`
   |
LL + #[derive(Clone)]
LL | pub struct NoDerives;
   |

error[E0599]: the method `extend_from_slice` exists for mutable reference `&mut Vec<SomeDerives>`, but its trait bounds were not satisfied
  --> $DIR/issue-91492.rs:12:9
   |
LL | pub struct SomeDerives;
   | ---------------------- doesn't satisfy `SomeDerives: Clone`
LL | fn fun2(foo: &mut Vec<SomeDerives>, bar: &[SomeDerives]) {
LL |     foo.extend_from_slice(bar);
   |         ^^^^^^^^^^^^^^^^^
   |
   = note: the following trait bounds were not satisfied:
           `SomeDerives: Clone`
help: consider annotating `SomeDerives` with `#[derive(Clone)]`
   |
LL + #[derive(Clone)]
LL | pub struct SomeDerives;
   |

error[E0599]: the method `use_clone` exists for struct `Object<NoDerives, SomeDerives>`, but its trait bounds were not satisfied
  --> $DIR/issue-91492.rs:22:9
   |
LL | pub struct NoDerives;
   | -------------------- doesn't satisfy `NoDerives: Clone`
...
LL | struct Object<T, A>(T, A);
   | ------------------- method `use_clone` not found for this struct
...
LL |     foo.use_clone();
   |         ^^^^^^^^^ method cannot be called on `Object<NoDerives, SomeDerives>` due to unsatisfied trait bounds
   |
note: trait bound `NoDerives: Clone` was not satisfied
  --> $DIR/issue-91492.rs:18:9
   |
LL | impl<T: Clone, A: Default> Object<T, A> {
   |         ^^^^^              ------------
   |         |
   |         unsatisfied trait bound introduced here
help: consider annotating `NoDerives` with `#[derive(Clone)]`
   |
LL + #[derive(Clone)]
LL | pub struct NoDerives;
   |

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0599`.