comparison core/lib/Drupal/Core/EventSubscriber/DefaultExceptionHtmlSubscriber.php @ 14:1fec387a4317

Update Drupal core to 8.5.2 via Composer

 <?php
 
 namespace Drupal\Core\EventSubscriber;
 
+use Drupal\Core\Cache\CacheableResponseInterface;
 use Drupal\Core\Routing\RedirectDestinationInterface;
 use Drupal\Core\Utility\Error;
 use Psr\Log\LoggerInterface;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;

       // @see https://www.drupal.org/node/2603788#comment-10504916
       if ($response->isSuccessful()) {
         $response->setStatusCode($status_code);
       }
 
+      // Persist the exception's cacheability metadata, if any. If the exception
+      // itself isn't cacheable, then this will make the response uncacheable:
+      // max-age=0 will be set.
+      if ($response instanceof CacheableResponseInterface) {
+        $response->addCacheableDependency($exception);
+      }
+
       // Persist any special HTTP headers that were set on the exception.
       if ($exception instanceof HttpExceptionInterface) {
         $response->headers->add($exception->getHeaders());
       }