 
         var numberOfTimes: Int = 0
         log.debug {
-            ++numberOfTimes
+            numberOfTimes += 1
             return nil
         }
 


        var numberOfTimes: Int = 0
        log.debug {
            ++numberOfTimes
            return "executed closure incorrectly"
        }



        var numberOfTimes: Int = 0
        log.debug {
            numberOfTimes += 1
            return "executed closure correctly"
        }

