Issue #2605280 by rakesh.gectcr: Missing return $this in Url::setUnrouted

core/lib/Drupal/Core/Url.php

@@ -515,6 +515,7 @@ protected function setUnrouted() {
     // Set empty route name and parameters.
     $this->routeName = NULL;
     $this->routeParameters = array();
+    return $this;
   }
 
   /**