--- includes/handlers.inc	(date 1499526873000)
+++ includes/handlers.inc	(revision )
@@ -1545,7 +1545,7 @@
     // Tack on the extra.
     if (isset($this->extra)) {
       $extras = array();
-      foreach ($this->extra as $info) {
+      foreach ((array) $this->extra as $info) {
         if (is_array($info)) {
           $extra = '';
           // Figure out the table name. Remember, only use aliases provided