warning: variable does not need to be mutable
  --> $DIR/issue-73592-borrow_mut-through-deref.rs:42:17
   |
LL | fn test_mut_pin(mut s: Pin<&S>) {
   |                 ----^
   |                 |
   |                 help: remove this `mut`
   |
note: the lint level is defined here
  --> $DIR/issue-73592-borrow_mut-through-deref.rs:20:9
   |
LL | #![warn(unused_mut)]
   |         ^^^^^^^^^^

warning: variable does not need to be mutable
  --> $DIR/issue-73592-borrow_mut-through-deref.rs:47:21
   |
LL | fn test_mut_pin_mut(mut s: Pin<&mut S>) {
   |                     ----^
   |                     |
   |                     help: remove this `mut`

warning: 2 warnings emitted