// Copyright 2014 the V8 project authors. All rights reserved.// Use of this source code is governed by a BSD-style license that can be// found in the LICENSE file.// Flags: --allow-natives-syntax --expose-debug-as debugDebug=debug.Debugfunctionlistener(event,exec_state,event_data,data){try{if(event==Debug.DebugEvent.Break){exec_state.prepareStep(Debug.StepAction.StepIn,3);}}catch(e){}}Debug.setListener(listener);functionf(x){if(x>0)%_CallFunction(null,x-1,f);}debugger;f(2);Debug.setListener(null);