This condition should NEVER be hit, but in case the started thread is unable to locate itself in the EVENT_DISOATCH_QUEUE_THREADS array, it's best to return null here and kill the unexpected event thread rather than segfault FS by writing outside of the bounds of the EVENT_DISPATCH_QUEUE_RUNNING array.

src/switch_event.c

@@ -26,7 +26,7 @@
  * Anthony Minessale II <anthm@freeswitch.org>
  * Michael Jerris <mike@jerris.com>
  * Paul D. Tinsley <pdt at jackhammer.org>
- *
+ * William King <william.king@quentustech.com>
  *
  * switch_event.c -- Event System
  *
@@ -254,6 +254,10 @@ static void *SWITCH_THREAD_FUNC switch_event_dispatch_thread(switch_thread_t *th
 		}
 	}
 
+	if ( my_id >= MAX_DISPATCH_VAL ) {
+		return NULL;
+	}
+
 	EVENT_DISPATCH_QUEUE_RUNNING[my_id] = 1;
 	switch_mutex_unlock(EVENT_QUEUE_MUTEX);