src/http/ngx_http_upstream.c:4129: error: Integer Overflow L2
  ([0, +oo] - 5):unsigned64 by call to `ngx_http_upstream_add`.

src/http/ngx_http_upstream.c:4129:12: Call
4127.     u.no_port = 1;
4128. 
4129.     uscf = ngx_http_upstream_add(cf, &u, NGX_HTTP_UPSTREAM_CREATE
                 ^
4130.                                          |NGX_HTTP_UPSTREAM_WEIGHT
4131.                                          |NGX_HTTP_UPSTREAM_MAX_FAILS

src/http/ngx_http_upstream.c:4357:1: Parameter `u->url.len`
  4355. 
  4356. 
  4357. ngx_http_upstream_srv_conf_t *
        ^
  4358. ngx_http_upstream_add(ngx_conf_t *cf, ngx_url_t *u, ngx_uint_t flags)
  4359. {

src/http/ngx_http_upstream.c:4367:13: Call
  4365.     if (!(flags & NGX_HTTP_UPSTREAM_CREATE)) {
  4366. 
  4367.         if (ngx_parse_url(cf->pool, u) != NGX_OK) {
                    ^
  4368.             if (u->err) {
  4369.                 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,

src/core/ngx_inet.c:514:1: Parameter `u->url.len`
    512. 
    513. 
    514. ngx_int_t
         ^
    515. ngx_parse_url(ngx_pool_t *pool, ngx_url_t *u)
    516. {

src/core/ngx_inet.c:522:16: Call
    520. 
    521.     if (ngx_strncasecmp(p, (u_char *) "unix:", 5) == 0) {
    522.         return ngx_parse_unix_domain_url(pool, u);
                        ^
    523.     }
    524. 

src/core/ngx_inet.c:533:1: <LHS trace>
531. 
532. 
533. static ngx_int_t
     ^
534. ngx_parse_unix_domain_url(ngx_pool_t *pool, ngx_url_t *u)
535. {

src/core/ngx_inet.c:533:1: Parameter `u->url.len`
      531. 
      532. 
      533. static ngx_int_t
           ^
      534. ngx_parse_unix_domain_url(ngx_pool_t *pool, ngx_url_t *u)
      535. {

src/core/ngx_inet.c:541:5: Assignment
      539.     struct sockaddr_un  *saun;
      540. 
      541.     len = u->url.len;
               ^
      542.     path = u->url.data;
      543. 

src/core/ngx_inet.c:545:5: Binary operation: ([0, +oo] - 5):unsigned64 by call to `ngx_http_upstream_add` 
      543. 
      544.     path += 5;
      545.     len -= 5;
               ^
      546. 
      547.     if (u->uri_part) {
