diff -u b/core/includes/bootstrap.inc b/core/includes/bootstrap.inc
--- b/core/includes/bootstrap.inc
+++ b/core/includes/bootstrap.inc
@@ -297,9 +297,7 @@
     if (\Drupal::hasService('cache.bootstrap')) {
       \Drupal::cache('bootstrap')->set('drupal_get_filename:missing', $missing, REQUEST_TIME);
     }
-    if (\Drupal::hasService('logger.factory')) {
-      \Drupal::logger('system')->error('The following @type is missing from the file system: @name', array('@type' => $type, '@name' => $name));
-    }
+    trigger_error(SafeMarkup::format('The following @type is missing from the file system: @name', array('@type' => $type, '@name' => $name)), E_USER_WARNING);
   }
 }