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:34:5 | LL | rc.clone(); | ^^^^^^^^^^ help: try this: `Rc::::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:37:5 | LL | arc.clone(); | ^^^^^^^^^^^ help: try this: `Arc::::clone(&arc)` error: using '.clone()' on a ref-counted pointer --> $DIR/unnecessary_clone.rs:40:5 | LL | rcweak.clone(); | ^^^^^^^^^^^^^^ help: try this: `Weak::::clone(&rcweak)` error: using '.clone()' on a ref-counted pointer --> $DIR/unnecessary_clone.rs:43:5 | LL | arc_weak.clone(); | ^^^^^^^^^^^^^^^^ help: try this: `Weak::::clone(&arc_weak)` error: using '.clone()' on a ref-counted pointer --> $DIR/unnecessary_clone.rs:47:29 | LL | let _: Arc = x.clone(); | ^^^^^^^^^ help: try this: `Arc::::clone(&x)` error: using `clone` on a `Copy` type --> $DIR/unnecessary_clone.rs:51:5 | LL | t.clone(); | ^^^^^^^^^ help: try removing the `clone` call: `t` error: using `clone` on a `Copy` type --> $DIR/unnecessary_clone.rs:53:5 | 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:59:22 | 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::clone(y); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: called `iter().cloned().collect()` on a slice to create a `Vec`. Calling `to_vec()` is both faster and more readable --> $DIR/unnecessary_clone.rs:66:27 | LL | let v2: Vec = v.iter().cloned().collect(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.to_vec()` | = note: `-D clippy::iter-cloned-collect` implied by `-D warnings` error: called `iter().cloned().collect()` on a slice to create a `Vec`. Calling `to_vec()` is both faster and more readable --> $DIR/unnecessary_clone.rs:71:38 | LL | let _: Vec = vec![1, 2, 3].iter().cloned().collect(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.to_vec()` error: called `iter().cloned().collect()` on a slice to create a `Vec`. Calling `to_vec()` is both faster and more readable --> $DIR/unnecessary_clone.rs:76:24 | LL | .to_bytes() | ________________________^ LL | | .iter() LL | | .cloned() LL | | .collect(); | |______________________^ help: try: `.to_vec()` error: using `clone` on a `Copy` type --> $DIR/unnecessary_clone.rs:114:20 | LL | let _: E = a.clone(); | ^^^^^^^^^ help: try dereferencing it: `*****a` error: aborting due to 15 previous errors