server/mpm/event/event.c:1668: error: INTEGER_OVERFLOW_L2
  ([0, +oo] - 1):unsigned32 by call to `TO_QUEUE_REMOVE`.

server/mpm/event/event.c:1667:5: Unknown value from: apr_thread_mutex_lock
1665.     }
1666. 
1667.     apr_thread_mutex_lock(timeout_mutex);
          ^
1668.     TO_QUEUE_REMOVE(q, cs);
1669.     rv = apr_pollset_remove(event_pollset, pfd);

server/mpm/event/event.c:1668:5: Call
1666. 
1667.     apr_thread_mutex_lock(timeout_mutex);
1668.     TO_QUEUE_REMOVE(q, cs);
          ^
1669.     rv = apr_pollset_remove(event_pollset, pfd);
1670.     apr_thread_mutex_unlock(timeout_mutex);

server/mpm/event/event.c:316:1: <LHS trace>
314. }
315. 
316. static void TO_QUEUE_REMOVE(struct timeout_queue *q, event_conn_state_t *el)
     ^
317. {
318.     APR_RING_REMOVE(el, timeout_list);

server/mpm/event/event.c:316:1: Parameter `*q->total`
  314. }
  315. 
  316. static void TO_QUEUE_REMOVE(struct timeout_queue *q, event_conn_state_t *el)
       ^
  317. {
  318.     APR_RING_REMOVE(el, timeout_list);

server/mpm/event/event.c:320:5: Binary operation: ([0, +oo] - 1):unsigned32 by call to `TO_QUEUE_REMOVE` 
  318.     APR_RING_REMOVE(el, timeout_list);
  319.     APR_RING_ELEM_INIT(el, timeout_list);
  320.     --*q->total;
           ^
  321.     --q->count;
  322. }
