src/tools/clippy/tests/ui/needless_pass_by_ref_mut2.stderr

error: this parameter is a mutable reference but is not used mutably
  --> tests/ui/needless_pass_by_ref_mut2.rs:8:26
   |
LL | async fn inner_async3(x: &mut i32, y: &mut u32) {
   |                          ^----^^^
   |                           |
   |                           help: consider removing this `mut`
   |
   = 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 parameter is a mutable reference but is not used mutably
  --> tests/ui/needless_pass_by_ref_mut2.rs:17:39
   |
LL | async fn inner_async4(u: &mut i32, v: &mut u32) {
   |                                       ^----^^^
   |                                        |
   |                                        help: consider removing this `mut`

error: this parameter is a mutable reference but is not used mutably
  --> tests/ui/needless_pass_by_ref_mut2.rs:29:37
   |
LL | fn issue16267<'a>(msg: &str, slice: &'a mut [i32]) -> &'a [i32] {
   |                                     ^^^^----^^^^^
   |                                         |
   |                                         help: consider removing this `mut`

error: aborting due to 3 previous errors