text: package sfBugs;
  
  import java.util.concurrent.locks.Lock;
  import java.util.concurrent.locks.ReentrantLock;
  
  public class Bug2791706 {
      public void clear() {
          Lock l = new ReentrantLock();
          l.lock();
          try {
              // do nothing
          } finally {
              l.unlock();
          }
      }
  }
  