Ticket #40161: 40161.patch

wp-includes/cron.php

@@ -55 +55 @@
         $event = apply_filters( 'schedule_event', $event );
 
         // A plugin disallowed this event
-        if ( ! $event )
+        if ( ! $event->hook )
                 return false;
 
         $key = md5(serialize($event->args));