error: explicit deref method call
  --> $DIR/dereference.rs:30:19
   |
LL |     let b: &str = a.deref();
   |                   ^^^^^^^^^ help: try this: `&*a`
   |
   = note: `-D clippy::explicit-deref-methods` implied by `-D warnings`

error: explicit deref_mut method call
  --> $DIR/dereference.rs:32:23
   |
LL |     let b: &mut str = a.deref_mut();
   |                       ^^^^^^^^^^^^^ help: try this: `&mut *a`

error: explicit deref method call
  --> $DIR/dereference.rs:35:39
   |
LL |     let b: String = format!("{}, {}", a.deref(), a.deref());
   |                                       ^^^^^^^^^ help: try this: `&*a`

error: explicit deref method call
  --> $DIR/dereference.rs:35:50
   |
LL |     let b: String = format!("{}, {}", a.deref(), a.deref());
   |                                                  ^^^^^^^^^ help: try this: `&*a`

error: explicit deref method call
  --> $DIR/dereference.rs:37:20
   |
LL |     println!("{}", a.deref());
   |                    ^^^^^^^^^ help: try this: `&*a`

error: explicit deref method call
  --> $DIR/dereference.rs:40:11
   |
LL |     match a.deref() {
   |           ^^^^^^^^^ help: try this: `&*a`

error: explicit deref method call
  --> $DIR/dereference.rs:44:28
   |
LL |     let b: String = concat(a.deref());
   |                            ^^^^^^^^^ help: try this: `&*a`

error: explicit deref method call
  --> $DIR/dereference.rs:46:13
   |
LL |     let b = just_return(a).deref();
   |             ^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&*just_return(a)`

error: explicit deref method call
  --> $DIR/dereference.rs:48:28
   |
LL |     let b: String = concat(just_return(a).deref());
   |                            ^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&*just_return(a)`

error: explicit deref method call
  --> $DIR/dereference.rs:50:19
   |
LL |     let b: &str = a.deref().deref();
   |                   ^^^^^^^^^^^^^^^^^ help: try this: `&*a.deref()`

error: explicit deref method call
  --> $DIR/dereference.rs:53:13
   |
LL |     let b = opt_a.unwrap().deref();
   |             ^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&*opt_a.unwrap()`

error: aborting due to 11 previous errors