(function($) {
  $(Screw).bind("before", function(){
    function example_name(element){
      // TODO: handle nested describes!
      var context_name = $(element).parents(".describe").children("h1").text();
      var example_name = $(element).children("h2").text();

      return context_name + " - " + example_name;
    }

    $('.it')
      .bind('passed', function(){ 
        java.lang.System.out.print(".");
      })
      .bind('failed', function(e, reason){
        print("\nFAILED: " + example_name(this));
        print("          " + reason + "\n");
        if (reason.rhinoException) {
          print(reason.rhinoException.scriptStackTrace);
        }
      });
  });

  $(Screw).bind("after", function(){
    var testCount = $('.passed').length + $('.failed').length;
    var failures = $('.failed').length;
    var elapsedTime = ((new Date() - Screw.suite_start_time)/1000.0);
    
    print("\n")
    print(testCount + ' test(s), ' + failures + ' failure(s)');
    print(elapsedTime.toString() + " seconds elapsed");
    
    if(failures > 0) { java.lang.System.exit(1) };
  });
})(jQuery);

(function($) {
  $(Screw).bind("before", function(){
    function example_name(element){
      // TODO: handle nested describes!
      var context_name = $(element).parents(".describe").children("h1").text();
      var example_name = $(element).children("h2").text();

      return context_name + " - " + example_name;
    }

    $('.it')
      .bind('passed', function(){ 
        java.lang.System.out.print(".");
      })
      .bind('failed', function(e, reason){
        print("\nFAILED: " + example_name(this));
        print("          " + reason + "\n");
      });
  });

  $(Screw).bind("after", function(){
    var testCount = $('.passed').length + $('.failed').length;
    var failures = $('.failed').length;
    var elapsedTime = ((new Date() - Screw.suite_start_time)/1000.0);
    
    print("\n")
    print(testCount + ' test(s), ' + failures + ' failure(s)');
    print(elapsedTime.toString() + " seconds elapsed");
    
    if(failures > 0) { java.lang.System.exit(1) };
  });
})(jQuery);

--- 
+++ 
@@ -15,6 +15,9 @@
       .bind('failed', function(e, reason){
         print("\nFAILED: " + example_name(this));
         print("          " + reason + "\n");
+        if (reason.rhinoException) {
+          print(reason.rhinoException.scriptStackTrace);
+        }
       });
   });
 
Print a stacktrace when a failure is caused by an exception 

When a spec fails due to an exception, the exception's stacktrace is printed when running the spec in Rhino. This helps to locate the code that caused the exception.