error: implementation of inherent method `to_string(&self) -> String` for type `A`
  --> $DIR/inherent_to_string.rs:22:5
   |
LL | /     fn to_string(&self) -> String {
LL | |
LL | |         "A.to_string()".to_string()
LL | |     }
   | |_____^
   |
   = help: implement trait `Display` for type `A` instead
   = note: `-D clippy::inherent-to-string` implied by `-D warnings`

error: type `C` implements inherent method `to_string(&self) -> String` which shadows the implementation of `Display`
  --> $DIR/inherent_to_string.rs:47:5
   |
LL | /     fn to_string(&self) -> String {
LL | |
LL | |         "C.to_string()".to_string()
LL | |     }
   | |_____^
   |
   = help: remove the inherent method from type `C`
   = note: `#[deny(clippy::inherent_to_string_shadow_display)]` on by default

error: aborting due to 2 previous errors