src/http/ngx_http_upstream.c:452: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64 by call to `ngx_http_upstream_create_round_robin_peer`.

src/http/ngx_http_upstream.c:452:17: Call
450.         if (u->resolved->sockaddr) {
451. 
452.             if (ngx_http_upstream_create_round_robin_peer(r, u->resolved)
                     ^
453.                 != NGX_OK)
454.             {

src/http/ngx_http_upstream_round_robin.c:250:1: <LHS trace>
248. 
249. 
250. ngx_int_t
     ^
251. ngx_http_upstream_create_round_robin_peer(ngx_http_request_t *r,
252.     ngx_http_upstream_resolved_t *ur)

src/http/ngx_http_upstream_round_robin.c:250:1: Parameter `ur->naddrs`
  248. 
  249. 
  250. ngx_int_t
       ^
  251. ngx_http_upstream_create_round_robin_peer(ngx_http_request_t *r,
  252.     ngx_http_upstream_resolved_t *ur)

src/http/ngx_http_upstream_round_robin.c:272:13: Binary operation: ([0, +oo] - 1):unsigned64 by call to `ngx_http_upstream_create_round_robin_peer` 
  270.     }
  271. 
  272.     peers = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_rr_peers_t)
                   ^
  273.                      + sizeof(ngx_http_upstream_rr_peer_t) * (ur->naddrs - 1));
  274.     if (peers == NULL) {
