error[E0599]: no method named `dog_age` found for struct `Dog` in the current scope --> $DIR/private-field.rs:16:23 | LL | pub struct Dog { | -------------- method `dog_age` not found for this struct ... LL | let dog_age = dog.dog_age(); | ^^^^^^^ private field, not a method error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0599`.