error: using `clone` on a `Copy` type
  --> $DIR/unnecessary_clone.rs:17:5
   |
LL |     42.clone();
   |     ^^^^^^^^^^ help: try removing the `clone` call: `42`
   |
   = note: `-D clippy::clone-on-copy` implied by `-D warnings`

error: using `clone` on a `Copy` type
  --> $DIR/unnecessary_clone.rs:21:5
   |
LL |     (&42).clone();
   |     ^^^^^^^^^^^^^ help: try dereferencing it: `*(&42)`

error: using `clone` on a `Copy` type
  --> $DIR/unnecessary_clone.rs:24:5
   |
LL |     rc.borrow().clone();
   |     ^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*rc.borrow()`

error: using '.clone()' on a ref-counted pointer
  --> $DIR/unnecessary_clone.rs:39:5
   |
LL |     rc.clone();
   |     ^^^^^^^^^^ help: try this: `Rc::<bool>::clone(&rc)`
   |
   = note: `-D clippy::clone-on-ref-ptr` implied by `-D warnings`

error: using '.clone()' on a ref-counted pointer
  --> $DIR/unnecessary_clone.rs:42:5
   |
LL |     arc.clone();
   |     ^^^^^^^^^^^ help: try this: `Arc::<bool>::clone(&arc)`

error: using '.clone()' on a ref-counted pointer
  --> $DIR/unnecessary_clone.rs:45:5
   |
LL |     rcweak.clone();
   |     ^^^^^^^^^^^^^^ help: try this: `Weak::<bool>::clone(&rcweak)`

error: using '.clone()' on a ref-counted pointer
  --> $DIR/unnecessary_clone.rs:48:5
   |
LL |     arc_weak.clone();
   |     ^^^^^^^^^^^^^^^^ help: try this: `Weak::<bool>::clone(&arc_weak)`

error: using '.clone()' on a ref-counted pointer
  --> $DIR/unnecessary_clone.rs:52:33
   |
LL |     let _: Arc<dyn SomeTrait> = x.clone();
   |                                 ^^^^^^^^^ help: try this: `Arc::<SomeImpl>::clone(&x)`

error: using `clone` on a `Copy` type
  --> $DIR/unnecessary_clone.rs:56:5
   |
LL |     t.clone();
   |     ^^^^^^^^^ help: try removing the `clone` call: `t`

error: using `clone` on a `Copy` type
  --> $DIR/unnecessary_clone.rs:58:5
   |
LL |     Some(t).clone();
   |     ^^^^^^^^^^^^^^^ help: try removing the `clone` call: `Some(t)`

error: using `clone` on a double-reference; this will copy the reference instead of cloning the inner type
  --> $DIR/unnecessary_clone.rs:64:22
   |
LL |     let z: &Vec<_> = y.clone();
   |                      ^^^^^^^^^
   |
   = note: `#[deny(clippy::clone_double_ref)]` on by default
help: try dereferencing it
   |
LL |     let z: &Vec<_> = &(*y).clone();
   |                      ^^^^^^^^^^^^^
help: or try being explicit about what type to clone
   |
LL |     let z: &Vec<_> = &std::vec::Vec<i32>::clone(y);
   |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: using `clone` on a `Copy` type
  --> $DIR/unnecessary_clone.rs:100:20
   |
LL |         let _: E = a.clone();
   |                    ^^^^^^^^^ help: try dereferencing it: `*****a`

error: aborting due to 12 previous errors