src/http/modules/ngx_http_scgi_module.c:1545: error: Integer Overflow L2
  ([0, +oo] - 5):unsigned64 by call to `ngx_http_upstream_add`.

src/http/modules/ngx_http_scgi_module.c:1545:30: Call
1543.     u.no_resolve = 1;
1544. 
1545.     scf->upstream.upstream = ngx_http_upstream_add(cf, &u, 0);
                                   ^
1546.     if (scf->upstream.upstream == NULL) {
1547.         return NGX_CONF_ERROR;

src/http/ngx_http_upstream.c:4100:1: Parameter `u->url.len`
  4098. 
  4099. 
  4100. ngx_http_upstream_srv_conf_t *
        ^
  4101. ngx_http_upstream_add(ngx_conf_t *cf, ngx_url_t *u, ngx_uint_t flags)
  4102. {

src/http/ngx_http_upstream.c:4110:13: Call
  4108.     if (!(flags & NGX_HTTP_UPSTREAM_CREATE)) {
  4109. 
  4110.         if (ngx_parse_url(cf->pool, u) != NGX_OK) {
                    ^
  4111.             if (u->err) {
  4112.                 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,

src/core/ngx_inet.c:510:1: Parameter `u->url.len`
    508. 
    509. 
    510. ngx_int_t
         ^
    511. ngx_parse_url(ngx_pool_t *pool, ngx_url_t *u)
    512. {

src/core/ngx_inet.c:518:16: Call
    516. 
    517.     if (ngx_strncasecmp(p, (u_char *) "unix:", 5) == 0) {
    518.         return ngx_parse_unix_domain_url(pool, u);
                        ^
    519.     }
    520. 

src/core/ngx_inet.c:534:1: <LHS trace>
532. 
533. 
534. static ngx_int_t
     ^
535. ngx_parse_unix_domain_url(ngx_pool_t *pool, ngx_url_t *u)
536. {

src/core/ngx_inet.c:534:1: Parameter `u->url.len`
      532. 
      533. 
      534. static ngx_int_t
           ^
      535. ngx_parse_unix_domain_url(ngx_pool_t *pool, ngx_url_t *u)
      536. {

src/core/ngx_inet.c:542:5: Assignment
      540.     struct sockaddr_un  *saun;
      541. 
      542.     len = u->url.len;
               ^
      543.     path = u->url.data;
      544. 

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