1 files changed, 12 insertions, 5 deletions
diff --git a/inc/lib/Twig/Node/Expression/Test/Defined.php b/inc/lib/Twig/Node/Expression/Test/Defined.php
index 247b2e23..2136c390 100644
--- a/inc/lib/Twig/Node/Expression/Test/Defined.php
+++ b/inc/lib/Twig/Node/Expression/Test/Defined.php
@@ -3,7 +3,7 @@
 /*
  * This file is part of Twig.
  *
- * (c) 2011 Fabien Potencier
+ * (c) Fabien Potencier
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -25,17 +25,22 @@ class Twig_Node_Expression_Test_Defined extends Twig_Node_Expression_Test
 {
     public function __construct(Twig_NodeInterface $node, $name, Twig_NodeInterface $arguments = null, $lineno)
     {
-        parent::__construct($node, $name, $arguments, $lineno);
-
         if ($node instanceof Twig_Node_Expression_Name) {
             $node->setAttribute('is_defined_test', true);
         } elseif ($node instanceof Twig_Node_Expression_GetAttr) {
             $node->setAttribute('is_defined_test', true);
-
             $this->changeIgnoreStrictCheck($node);
+        } elseif ($node instanceof Twig_Node_Expression_BlockReference) {
+            $node->setAttribute('is_defined_test', true);
+        } elseif ($node instanceof Twig_Node_Expression_Function && 'constant' === $node->getAttribute('name')) {
+            $node->setAttribute('is_defined_test', true);
+        } elseif ($node instanceof Twig_Node_Expression_Constant || $node instanceof Twig_Node_Expression_Array) {
+            $node = new Twig_Node_Expression_Constant(true, $node->getTemplateLine());
         } else {
-            throw new Twig_Error_Syntax('The "defined" test only works with simple variables', $this->getLine());
+            throw new Twig_Error_Syntax('The "defined" test only works with simple variables.', $this->getTemplateLine());
         }
+
+        parent::__construct($node, $name, $arguments, $lineno);
     }
 
     protected function changeIgnoreStrictCheck(Twig_Node_Expression_GetAttr $node)
@@ -52,3 +57,5 @@ class Twig_Node_Expression_Test_Defined extends Twig_Node_Expression_Test
         $compiler->subcompile($this->getNode('node'));
     }
 }
+
+class_alias('Twig_Node_Expression_Test_Defined', 'Twig\Node\Expression\Test\DefinedTest', false);