comparison vendor/zendframework/zend-feed/src/Writer/Renderer/Entry/Rss.php @ 5:12f9dff5fda9 tip

Update to Drupal core 8.7.1

                 $this->getDataContainer()->getLink()
             );
         }
         $text = $dom->createTextNode($this->getDataContainer()->getId());
         $id->appendChild($text);
-        if (! Uri::factory($this->getDataContainer()->getId())->isValid()) {
+
+        $uri = Uri::factory($this->getDataContainer()->getId());
+        if (! $uri->isValid() || ! $uri->isAbsolute()) {
+            /** @see http://www.rssboard.org/rss-profile#element-channel-item-guid */
             $id->setAttribute('isPermaLink', 'false');
         }
     }
 
     /**