diff --git a/src/Php/AstNodeType.php b/src/Php/AstNodeType.php
index e27b5140..46f9b2a1 100644
--- a/src/Php/AstNodeType.php
+++ b/src/Php/AstNodeType.php
@@ -145,6 +145,6 @@ trait AstNodeType
 
     protected function isNull(NodeAbstract $expr): bool
     {
-        return $expr instanceof Node\Expr\ConstFetch && $expr->name->toString() === 'null';
+        return $expr instanceof Expr\ConstFetch && $expr->name->toString() === 'null';
     }
 }
diff --git a/src/Php/Translator.php b/src/Php/Translator.php
index 9a37973b..da4b0bed 100644
--- a/src/Php/Translator.php
+++ b/src/Php/Translator.php
@@ -1247,6 +1247,11 @@ class Translator extends Preprocessor
         return $code;
     }
 
+    protected function parseTrait(Node\Stmt\Trait_ $trait)
+    {
+        throw new Unsupported('Unsupported Trait ');
+    }
+
     private function getRegisterClassFunctionArgDef(ClassDef|InterfaceDef $classDef): string
     {
         $depsCeList = $this->getRegisterClassFunctionCeList($classDef);
@@ -1367,9 +1372,4 @@ class Translator extends Preprocessor
 
         return $code;
     }
-
-    protected function parseTrait(Node\Stmt\Trait_ $trait)
-    {
-        throw new Unsupported('Unsupported Trait ');
-    }
 }
diff --git a/tests/aot/ref/002.phpt b/tests/aot/ref/002.phpt
new file mode 100644
index 00000000..94da74bb
--- /dev/null
+++ b/tests/aot/ref/002.phpt
@@ -0,0 +1,23 @@
+--TEST--
+ref 002
+--FILE--
+<?php
+function main()
+{
+    $a = [1, 2, 3];
+    $b = &$a;
+    $b[] = 5;
+    var_dump($a);
+}
+?>
+--EXPECT--
+array(4) {
+  [0]=>
+  int(1)
+  [1]=>
+  int(2)
+  [2]=>
+  int(3)
+  [3]=>
+  int(5)
+}
\ No newline at end of file