error: this call to `as_ref` does nothing
  --> $DIR/useless_asref.rs:46:18
   |
LL |         foo_rstr(rstr.as_ref());
   |                  ^^^^^^^^^^^^^ help: try: `rstr`
   |
note: the lint level is defined here
  --> $DIR/useless_asref.rs:1:9
   |
LL | #![deny(clippy::useless_asref)]
   |         ^^^^^^^^^^^^^^^^^^^^^

error: this call to `as_ref` does nothing
  --> $DIR/useless_asref.rs:48:20
   |
LL |         foo_rslice(rslice.as_ref());
   |                    ^^^^^^^^^^^^^^^ help: try: `rslice`

error: this call to `as_mut` does nothing
  --> $DIR/useless_asref.rs:52:21
   |
LL |         foo_mrslice(mrslice.as_mut());
   |                     ^^^^^^^^^^^^^^^^ help: try: `mrslice`

error: this call to `as_ref` does nothing
  --> $DIR/useless_asref.rs:54:20
   |
LL |         foo_rslice(mrslice.as_ref());
   |                    ^^^^^^^^^^^^^^^^ help: try: `mrslice`

error: this call to `as_ref` does nothing
  --> $DIR/useless_asref.rs:61:20
   |
LL |         foo_rslice(rrrrrslice.as_ref());
   |                    ^^^^^^^^^^^^^^^^^^^ help: try: `rrrrrslice`

error: this call to `as_ref` does nothing
  --> $DIR/useless_asref.rs:63:18
   |
LL |         foo_rstr(rrrrrstr.as_ref());
   |                  ^^^^^^^^^^^^^^^^^ help: try: `rrrrrstr`

error: this call to `as_mut` does nothing
  --> $DIR/useless_asref.rs:68:21
   |
LL |         foo_mrslice(mrrrrrslice.as_mut());
   |                     ^^^^^^^^^^^^^^^^^^^^ help: try: `mrrrrrslice`

error: this call to `as_ref` does nothing
  --> $DIR/useless_asref.rs:70:20
   |
LL |         foo_rslice(mrrrrrslice.as_ref());
   |                    ^^^^^^^^^^^^^^^^^^^^ help: try: `mrrrrrslice`

error: this call to `as_ref` does nothing
  --> $DIR/useless_asref.rs:74:16
   |
LL |     foo_rrrrmr((&&&&MoreRef).as_ref());
   |                ^^^^^^^^^^^^^^^^^^^^^^ help: try: `(&&&&MoreRef)`

error: this call to `as_mut` does nothing
  --> $DIR/useless_asref.rs:124:13
   |
LL |     foo_mrt(mrt.as_mut());
   |             ^^^^^^^^^^^^ help: try: `mrt`

error: this call to `as_ref` does nothing
  --> $DIR/useless_asref.rs:126:12
   |
LL |     foo_rt(mrt.as_ref());
   |            ^^^^^^^^^^^^ help: try: `mrt`

error: you are explicitly cloning with `.map()`
  --> $DIR/useless_asref.rs:137:13
   |
LL |     let y = x.as_ref().map(Clone::clone);
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling the dedicated `cloned` method: `x.as_ref().cloned()`
   |
   = note: `-D clippy::map-clone` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::map_clone)]`

error: you are explicitly cloning with `.map()`
  --> $DIR/useless_asref.rs:139:13
   |
LL |     let y = x.as_ref().map(String::clone);
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling the dedicated `cloned` method: `x.as_ref().cloned()`

error: aborting due to 13 previous errors