import org.checkerframework.checker.initialization.qual.*;
import org.checkerframework.checker.nullness.qual.*;

public class Uninit8 {

  Object f;

  Uninit8() {
    setFields();
    f.toString();
  }

  @EnsuresNonNull("f")
  void setFields(@UnknownInitialization Uninit8 this) {
    f = new Object();
  }
}