text: /*******************************************************************************
      Copyright (c) 2013, KAIST.
      All rights reserved.
  
      Use is subject to license terms.
  
      This distribution may include materials developed by third parties.
   ***************************************************************************** */
  
  function foo() {
  	function bar() {
  		var x;
  		return x;
  	}
  	bar();
  	return x;
  }
  foo();