[2.1][TwigBridge] Fixes Issue #7342 in TwigBridge

src/Symfony/Bridge/Twig/NodeVisitor/Scope.php

@@ -32,6 +32,7 @@ class Scope
      */
     public function __construct(Scope $parent = null)
     {
+        $this->data = array();
         $this->parent = $parent;
         $this->left = false;
     }

src/Symfony/Bridge/Twig/Tests/NodeVisitor/ScopeTest.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace Symfony\Bridge\Twig\Tests\NodeVisitor;
+
+use Symfony\Bridge\Twig\NodeVisitor\Scope;
+use Symfony\Bridge\Twig\Tests\TestCase;
+
+class ScopeTest extends TestCase
+{
+    public function testScopeInitiation()
+    {
+        $scope = new Scope();
+        $scope->enter();
+        $this->assertNull($scope->get('test'));
+    }
+}