error: this argument is a mutable reference, but not used mutably
  --> tests/ui/needless_pass_by_ref_mut2.rs:8:30
   |
LL | pub async fn inner_async3(x: &mut i32, y: &mut u32) {
   |                              ^^^^^^^^ help: consider changing to: `&i32`
   |
   = warning: changing this function will impact semver compatibility
   = note: `-D clippy::needless-pass-by-ref-mut` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::needless_pass_by_ref_mut)]`

error: this argument is a mutable reference, but not used mutably
  --> tests/ui/needless_pass_by_ref_mut2.rs:16:43
   |
LL | pub async fn inner_async4(u: &mut i32, v: &mut u32) {
   |                                           ^^^^^^^^ help: consider changing to: `&u32`
   |
   = warning: changing this function will impact semver compatibility

error: aborting due to 2 previous errors