error: this argument is a mutable reference, but not used mutably
  --> $DIR/needless_pass_by_ref_mut.rs:6:11
   |
LL | fn foo(s: &mut Vec<u32>, b: &u32, x: &mut u32) {
   |           ^^^^^^^^^^^^^ help: consider changing to: `&Vec<u32>`
   |
   = note: `-D clippy::needless-pass-by-ref-mut` implied by `-D warnings`

error: this argument is a mutable reference, but not used mutably
  --> $DIR/needless_pass_by_ref_mut.rs:31:12
   |
LL | fn foo6(s: &mut Vec<u32>) {
   |            ^^^^^^^^^^^^^ help: consider changing to: `&Vec<u32>`

error: this argument is a mutable reference, but not used mutably
  --> $DIR/needless_pass_by_ref_mut.rs:44:29
   |
LL |     fn mushroom(&self, vec: &mut Vec<i32>) -> usize {
   |                             ^^^^^^^^^^^^^ help: consider changing to: `&Vec<i32>`

error: this argument is a mutable reference, but not used mutably
  --> $DIR/needless_pass_by_ref_mut.rs:49:31
   |
LL |     fn badger(&mut self, vec: &mut Vec<i32>) -> usize {
   |                               ^^^^^^^^^^^^^ help: consider changing to: `&Vec<i32>`

error: this argument is a mutable reference, but not used mutably
  --> $DIR/needless_pass_by_ref_mut.rs:126:16
   |
LL | async fn a1(x: &mut i32) {
   |                ^^^^^^^^ help: consider changing to: `&i32`

error: this argument is a mutable reference, but not used mutably
  --> $DIR/needless_pass_by_ref_mut.rs:130:16
   |
LL | async fn a2(x: &mut i32, y: String) {
   |                ^^^^^^^^ help: consider changing to: `&i32`

error: this argument is a mutable reference, but not used mutably
  --> $DIR/needless_pass_by_ref_mut.rs:134:16
   |
LL | async fn a3(x: &mut i32, y: String, z: String) {
   |                ^^^^^^^^ help: consider changing to: `&i32`

error: this argument is a mutable reference, but not used mutably
  --> $DIR/needless_pass_by_ref_mut.rs:138:16
   |
LL | async fn a4(x: &mut i32, y: i32) {
   |                ^^^^^^^^ help: consider changing to: `&i32`

error: this argument is a mutable reference, but not used mutably
  --> $DIR/needless_pass_by_ref_mut.rs:142:24
   |
LL | async fn a5(x: i32, y: &mut i32) {
   |                        ^^^^^^^^ help: consider changing to: `&i32`

error: this argument is a mutable reference, but not used mutably
  --> $DIR/needless_pass_by_ref_mut.rs:146:24
   |
LL | async fn a6(x: i32, y: &mut i32) {
   |                        ^^^^^^^^ help: consider changing to: `&i32`

error: this argument is a mutable reference, but not used mutably
  --> $DIR/needless_pass_by_ref_mut.rs:150:32
   |
LL | async fn a7(x: i32, y: i32, z: &mut i32) {
   |                                ^^^^^^^^ help: consider changing to: `&i32`

error: this argument is a mutable reference, but not used mutably
  --> $DIR/needless_pass_by_ref_mut.rs:154:24
   |
LL | async fn a8(x: i32, a: &mut i32, y: i32, z: &mut i32) {
   |                        ^^^^^^^^ help: consider changing to: `&i32`

error: this argument is a mutable reference, but not used mutably
  --> $DIR/needless_pass_by_ref_mut.rs:154:45
   |
LL | async fn a8(x: i32, a: &mut i32, y: i32, z: &mut i32) {
   |                                             ^^^^^^^^ help: consider changing to: `&i32`

error: this argument is a mutable reference, but not used mutably
  --> $DIR/needless_pass_by_ref_mut.rs:188:16
   |
LL | fn cfg_warn(s: &mut u32) {}
   |                ^^^^^^^^ help: consider changing to: `&u32`
   |
   = note: this is cfg-gated and may require further changes

error: this argument is a mutable reference, but not used mutably
  --> $DIR/needless_pass_by_ref_mut.rs:194:20
   |
LL |     fn cfg_warn(s: &mut u32) {}
   |                    ^^^^^^^^ help: consider changing to: `&u32`
   |
   = note: this is cfg-gated and may require further changes

error: aborting due to 15 previous errors