server/mpm/event/event.c:1159: error: INTEGER_OVERFLOW_L2
  ([0, +oo] - 1):unsigned32 by call to `TO_QUEUE_REMOVE`.

server/mpm/event/event.c:1157:18: Unknown value from: apr_pollset_add
1155.             apr_thread_mutex_lock(timeout_mutex);
1156.             TO_QUEUE_APPEND(cs->sc->wc_q, cs);
1157.             rc = apr_pollset_add(event_pollset, &cs->pfd);
                       ^
1158.             if (rc != APR_SUCCESS && !APR_STATUS_IS_EEXIST(rc)) {
1159.                 TO_QUEUE_REMOVE(cs->sc->wc_q, cs);

server/mpm/event/event.c:1159:17: Call
1157.             rc = apr_pollset_add(event_pollset, &cs->pfd);
1158.             if (rc != APR_SUCCESS && !APR_STATUS_IS_EEXIST(rc)) {
1159.                 TO_QUEUE_REMOVE(cs->sc->wc_q, cs);
                      ^
1160.                 apr_thread_mutex_unlock(timeout_mutex);
1161.                 ap_log_error(APLOG_MARK, APLOG_ERR, rc, ap_server_conf, APLOGNO(03465)

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. }
