simplified code

lib/Twig/Util/DeprecationCollector.php

@@ -15,7 +15,6 @@
 class Twig_Util_DeprecationCollector
 {
     private $twig;
-    private $deprecations;
 
     public function __construct(Twig_Environment $twig)
     {
@@ -50,9 +49,12 @@ class Twig_Util_DeprecationCollector
      */
     public function collect(Iterator $iterator)
     {
-        $this->deprecations = array();
-
-        set_error_handler(array($this, 'errorHandler'));
+        $deprecations = array();
+        set_error_handler(function($type, $msg) use (&$deprecations) {
+            if (E_USER_DEPRECATED === $type) {
+                $deprecations[] = $msg;
+            }
+        });
 
         foreach ($iterator as $name => $contents) {
             try {
@@ -64,19 +66,6 @@ class Twig_Util_DeprecationCollector
 
         restore_error_handler();
 
-        $deprecations = $this->deprecations;
-        $this->deprecations = array();
-
         return $deprecations;
     }
-
-    /**
-     * @internal
-     */
-    public function errorHandler($type, $msg)
-    {
-        if (E_USER_DEPRECATED === $type) {
-            $this->deprecations[] = $msg;
-        }
-    }
 }