error: this call to `as_ref` does nothing
  --> $DIR/useless_asref.rs:41:18
   |
LL |         foo_rstr(rstr.as_ref());
   |                  ^^^^^^^^^^^^^ help: try this: `rstr`
   |
note: lint level 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:43:20
   |
LL |         foo_rslice(rslice.as_ref());
   |                    ^^^^^^^^^^^^^^^ help: try this: `rslice`

error: this call to `as_mut` does nothing
  --> $DIR/useless_asref.rs:47:21
   |
LL |         foo_mrslice(mrslice.as_mut());
   |                     ^^^^^^^^^^^^^^^^ help: try this: `mrslice`

error: this call to `as_ref` does nothing
  --> $DIR/useless_asref.rs:49:20
   |
LL |         foo_rslice(mrslice.as_ref());
   |                    ^^^^^^^^^^^^^^^^ help: try this: `mrslice`

error: this call to `as_ref` does nothing
  --> $DIR/useless_asref.rs:56:20
   |
LL |         foo_rslice(rrrrrslice.as_ref());
   |                    ^^^^^^^^^^^^^^^^^^^ help: try this: `rrrrrslice`

error: this call to `as_ref` does nothing
  --> $DIR/useless_asref.rs:58:18
   |
LL |         foo_rstr(rrrrrstr.as_ref());
   |                  ^^^^^^^^^^^^^^^^^ help: try this: `rrrrrstr`

error: this call to `as_mut` does nothing
  --> $DIR/useless_asref.rs:63:21
   |
LL |         foo_mrslice(mrrrrrslice.as_mut());
   |                     ^^^^^^^^^^^^^^^^^^^^ help: try this: `mrrrrrslice`

error: this call to `as_ref` does nothing
  --> $DIR/useless_asref.rs:65:20
   |
LL |         foo_rslice(mrrrrrslice.as_ref());
   |                    ^^^^^^^^^^^^^^^^^^^^ help: try this: `mrrrrrslice`

error: this call to `as_ref` does nothing
  --> $DIR/useless_asref.rs:68:16
   |
LL |     foo_rrrrmr((&&&&MoreRef).as_ref());
   |                ^^^^^^^^^^^^^^^^^^^^^^ help: try this: `(&&&&MoreRef)`

error: this call to `as_mut` does nothing
  --> $DIR/useless_asref.rs:118:13
   |
LL |     foo_mrt(mrt.as_mut());
   |             ^^^^^^^^^^^^ help: try this: `mrt`

error: this call to `as_ref` does nothing
  --> $DIR/useless_asref.rs:120:12
   |
LL |     foo_rt(mrt.as_ref());
   |            ^^^^^^^^^^^^ help: try this: `mrt`

error: aborting due to 11 previous errors