go

@@ -38,7 +38,7 @@ class SwGo {
         go(function (\Closure $run,...$param){
             self::$runNumber++;
             $end = null;
-            if(empty($param[0]) && $param[0] instanceof \Closure){
+            if(!empty($param[0]) && $param[0] instanceof \Closure){
                 $end = $param[0];
                 unset($param[0]);
                 $param = array_values($param);