error[E0425]: cannot find value `meows` in this scope --> $DIR/class-missing-self.rs:9:7 | LL | meows += 1; | ^^^^^ help: try: `self.meows` error[E0425]: cannot find function `sleep` in this scope --> $DIR/class-missing-self.rs:10:7 | LL | sleep(); | ^^^^^ not found in this scope help: possible candidate is found in another module, you can import it into scope | LL | use std::thread::sleep; | error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0425`.