src/http/ngx_http_upstream.c:5445: error: Integer Overflow L2
  ([0, +oo] - 5):unsigned64 by call to `ngx_http_upstream_add`.

src/http/ngx_http_upstream.c:5445:12: Call
5443.     u.no_port = 1;
5444. 
5445.     uscf = ngx_http_upstream_add(cf, &u, NGX_HTTP_UPSTREAM_CREATE
                 ^
5446.                                          |NGX_HTTP_UPSTREAM_WEIGHT
5447.                                          |NGX_HTTP_UPSTREAM_MAX_CONNS

src/http/ngx_http_upstream.c:5698:1: Parameter `u->url.len`
  5696. 
  5697. 
  5698. ngx_http_upstream_srv_conf_t *
        ^
  5699. ngx_http_upstream_add(ngx_conf_t *cf, ngx_url_t *u, ngx_uint_t flags)
  5700. {

src/http/ngx_http_upstream.c:5708:13: Call
  5706.     if (!(flags & NGX_HTTP_UPSTREAM_CREATE)) {
  5707. 
  5708.         if (ngx_parse_url(cf->pool, u) != NGX_OK) {
                    ^
  5709.             if (u->err) {
  5710.                 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,

src/core/ngx_inet.c:677:1: Parameter `u->url.len`
    675. 
    676. 
    677. ngx_int_t
         ^
    678. ngx_parse_url(ngx_pool_t *pool, ngx_url_t *u)
    679. {

src/core/ngx_inet.c:687:16: Call
    685. 
    686.     if (len >= 5 && ngx_strncasecmp(p, (u_char *) "unix:", 5) == 0) {
    687.         return ngx_parse_unix_domain_url(pool, u);
                        ^
    688.     }
    689. 

src/core/ngx_inet.c:698:1: <LHS trace>
696. 
697. 
698. static ngx_int_t
     ^
699. ngx_parse_unix_domain_url(ngx_pool_t *pool, ngx_url_t *u)
700. {

src/core/ngx_inet.c:698:1: Parameter `u->url.len`
      696. 
      697. 
      698. static ngx_int_t
           ^
      699. ngx_parse_unix_domain_url(ngx_pool_t *pool, ngx_url_t *u)
      700. {

src/core/ngx_inet.c:706:5: Assignment
      704.     struct sockaddr_un  *saun;
      705. 
      706.     len = u->url.len;
               ^
      707.     path = u->url.data;
      708. 

src/core/ngx_inet.c:710:5: Binary operation: ([0, +oo] - 5):unsigned64 by call to `ngx_http_upstream_add` 
      708. 
      709.     path += 5;
      710.     len -= 5;
               ^
      711. 
      712.     if (u->uri_part) {
