core/lib/Drupal/Core/Routing/AccessAwareRouter.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/core/lib/Drupal/Core/Routing/AccessAwareRouter.php b/core/lib/Drupal/Core/Routing/AccessAwareRouter.php
index 20b0ecf..ed4857f 100644
--- a/core/lib/Drupal/Core/Routing/AccessAwareRouter.php
+++ b/core/lib/Drupal/Core/Routing/AccessAwareRouter.php
@@ -89,6 +89,7 @@ public function matchRequest(Request $request) {
     $parameters = $this->chainRouter->matchRequest($request);
     $request->attributes->add($parameters);
     $this->checkAccess($request);
+    exit;
     // We can not return $parameters because the access check can change the
     // request attributes.
     return $request->attributes->all();