Fixed

Author: lazychaser

composer.json

@@ -13,9 +13,9 @@
 
     "require": {
         "php": ">=5.5.9",
-        "illuminate/support": "5.0 - 5.5",
-        "illuminate/database": "5.0 - 5.5",
-        "illuminate/events": "5.0 - 5.5"
+        "illuminate/support": "5.2 - 5.5",
+        "illuminate/database": "5.2 - 5.5",
+        "illuminate/events": "5.2 - 5.5"
     },
 
     "autoload": {

src/QueryBuilder.php

@@ -857,7 +857,7 @@ public function fixTree($root = null)
         $dictionary = $this->model
             ->newNestedSetQuery()
             ->when($root, function (self $query) use ($root) {
-                $query->whereDescendantOf($root);
+                return $query->whereDescendantOf($root);
             })
             ->defaultOrder()
             ->get($columns)
@@ -969,7 +969,7 @@ public function rebuildTree(array $data, $delete = false, $root = null)
 
         $existing = $this
             ->when($root, function (self $query) use ($root) {
-                $query->whereDescendantOf($root);
+                return $query->whereDescendantOf($root);
             })
             ->get()
             ->getDictionary();