anchor.diff:        }
   
         callback();
  +    }).catchError((error) {
  +      Logger.root.severe("one time build of all packages error: $error");
       });
     }
   
  
positive.code: 
  void main(args) {
    Logger.root.onRecord.listen((LogRecord record) {
      print("isolate_main: ${record.message}");
    });
  
    ArgParser parser = _createArgsParser();
  
negative.code:       this.queueIsolate = queueIsolate;
        // setup timer now...
        _timer = new Timer.periodic(_timeout, callback);
        _initServer();
      });
    }
  