Issue #2221535 by Cottser, joelpittet: TwigNodeVisitor's priority is too early and breaks some filters and macros.

core/lib/Drupal/Core/Template/TwigNodeVisitor.php

@@ -47,10 +47,9 @@ class TwigNodeVisitor implements \Twig_NodeVisitorInterface {
   }
 
   /**
-   * Implements Twig_NodeVisitorInterface::getPriority().
+   * {@inheritdoc}
    */
   function getPriority() {
-    // We want to run before other NodeVisitors like Escape or Optimizer
+    return 1;
-    return -1;
   }
 }

core/modules/system/lib/Drupal/system/Tests/Theme/TwigRawTest.php

@@ -0,0 +1,45 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\system\Tests\Theme\TwigRawTest.
+ */
+
+namespace Drupal\system\Tests\Theme;
+
+use Drupal\simpletest\WebTestBase;
+
+/**
+ * Tests 'raw' Twig filter.
+ */
+class TwigRawTest extends WebTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array('twig_theme_test');
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Twig raw filter',
+      'description' => "Tests Twig 'raw' filter.",
+      'group' => 'Theme',
+    );
+  }
+
+  /**
+   * Tests the raw filter inside an autoescape tag.
+   */
+  public function testAutoescapeRaw() {
+    $test = array(
+      '#theme' => 'twig_raw_test',
+      '#script' => '<script>alert("This alert is real because I will put it through the raw filter!");</script>',
+    );
+    $rendered = drupal_render($test);
+    $this->drupalSetContent($rendered);
+    $this->assertRaw('<script>alert("This alert is real because I will put it through the raw filter!");</script>');
+  }
+
+}

core/modules/system/tests/modules/twig_theme_test/templates/twig-raw-test.html.twig

@@ -0,0 +1,4 @@
+{# Template for testing |raw with autoescape. #}
+{% autoescape %}
+  {{ script|raw }}
+{% endautoescape %}

core/modules/system/tests/modules/twig_theme_test/twig_theme_test.module

@@ -19,6 +19,10 @@ function twig_theme_test_theme($existing, $type, $theme, $path) {
     'variables' => array(),
     'template' => 'twig_namespace_test',
   );
+  $items['twig_raw_test'] = array(
+    'variables' => array('script' => ''),
+    'template' => 'twig-raw-test',
+  );
   return $items;
 }