src/http/ngx_http_upstream.c:2242: error: Integer Overflow L2
  ([0, -1+max(1, `r->uri_changes`)] - 1):unsigned32 by call to `ngx_http_finalize_request`.

src/http/ngx_http_upstream.c:2177:1: Parameter `r->uri_changes`
2175. 
2176. 
2177. static ngx_int_t
      ^
2178. ngx_http_upstream_process_headers(ngx_http_request_t *r, ngx_http_upstream_t *u)
2179. {

src/http/ngx_http_upstream.c:2192:9: Call
2190.         && !(u->conf->ignore_headers & NGX_HTTP_UPSTREAM_IGN_XA_REDIRECT))
2191.     {
2192.         ngx_http_upstream_finalize_request(r, u, NGX_DECLINED);
              ^
2193. 
2194.         part = &u->headers_in.headers.part;

src/http/ngx_http_upstream.c:3658:1: Parameter `r->uri_changes`
  3656. 
  3657. 
  3658. static void
        ^
  3659. ngx_http_upstream_finalize_request(ngx_http_request_t *r,
  3660.     ngx_http_upstream_t *u, ngx_int_t rc)

src/http/ngx_http_upstream.c:2224:13: Call
2222. 
2223.         if (uri.data[0] == '@') {
2224.             ngx_http_named_location(r, &uri);
                  ^
2225. 
2226.         } else {

src/http/ngx_http_core_module.c:2648:1: Parameter `r->uri_changes`
  2646. 
  2647. 
  2648. ngx_int_t
        ^
  2649. ngx_http_named_location(ngx_http_request_t *r, ngx_str_t *name)
  2650. {

src/http/ngx_http_core_module.c:2656:5: Assignment
  2654. 
  2655.     r->main->count++;
  2656.     r->uri_changes--;
            ^
  2657. 
  2658.     if (r->uri_changes == 0) {

src/http/ngx_http_upstream.c:2242:9: Call
2240.         }
2241. 
2242.         ngx_http_finalize_request(r, NGX_DONE);
              ^
2243.         return NGX_DONE;
2244.     }

src/http/ngx_http_request.c:2252:1: Parameter `r->uri_changes`
  2250. 
  2251. 
  2252. void
        ^
  2253. ngx_http_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
  2254. {

src/http/ngx_http_request.c:2290:13: Call
  2288.         || c->error)
  2289.     {
  2290.         if (ngx_http_post_action(r) == NGX_OK) {
                    ^
  2291.             return;
  2292.         }

src/http/ngx_http_request.c:3343:1: Parameter `r->uri_changes`
    3341. 
    3342. 
    3343. static ngx_int_t
          ^
    3344. ngx_http_post_action(ngx_http_request_t *r)
    3345. {

src/http/ngx_http_request.c:3370:9: Call
    3368. 
    3369.     if (clcf->post_action.data[0] == '/') {
    3370.         ngx_http_internal_redirect(r, &clcf->post_action, NULL);
                  ^
    3371. 
    3372.     } else {

src/http/ngx_http_core_module.c:2593:1: <LHS trace>
2591. 
2592. 
2593. ngx_int_t
      ^
2594. ngx_http_internal_redirect(ngx_http_request_t *r,
2595.     ngx_str_t *uri, ngx_str_t *args)

src/http/ngx_http_core_module.c:2593:1: Parameter `r->uri_changes`
      2591. 
      2592. 
      2593. ngx_int_t
            ^
      2594. ngx_http_internal_redirect(ngx_http_request_t *r,
      2595.     ngx_str_t *uri, ngx_str_t *args)

src/http/ngx_http_core_module.c:2599:5: Binary operation: ([0, -1+max(1, r->uri_changes)] - 1):unsigned32 by call to `ngx_http_finalize_request` 
      2597.     ngx_http_core_srv_conf_t  *cscf;
      2598. 
      2599.     r->uri_changes--;
                ^
      2600. 
      2601.     if (r->uri_changes == 0) {
