Identify the flaw in this State pattern code snippet:

Identify the flaw in this State pattern code snippet:

class Context {
  State state;
  Context(State s) { state = s; }
  void request() { state.handle(this); }
}

interface State {
  void handle(Context c);
}

class ConcreteState implements State {
  public void handle(Context c) {
    // Missing state transition logic
  }
}