src/http/ngx_http_upstream.c:2310: 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:2245:1: Parameter `r->uri_changes`
2243. 
2244. 
2245. static ngx_int_t
      ^
2246. ngx_http_upstream_process_headers(ngx_http_request_t *r, ngx_http_upstream_t *u)
2247. {

src/http/ngx_http_upstream.c:2260:9: Call
2258.         && !(u->conf->ignore_headers & NGX_HTTP_UPSTREAM_IGN_XA_REDIRECT))
2259.     {
2260.         ngx_http_upstream_finalize_request(r, u, NGX_DECLINED);
              ^
2261. 
2262.         part = &u->headers_in.headers.part;

src/http/ngx_http_upstream.c:3744:1: Parameter `r->uri_changes`
  3742. 
  3743. 
  3744. static void
        ^
  3745. ngx_http_upstream_finalize_request(ngx_http_request_t *r,
  3746.     ngx_http_upstream_t *u, ngx_int_t rc)

src/http/ngx_http_upstream.c:2292:13: Call
2290. 
2291.         if (uri.data[0] == '@') {
2292.             ngx_http_named_location(r, &uri);
                  ^
2293. 
2294.         } else {

src/http/ngx_http_core_module.c:2636:1: Parameter `r->uri_changes`
  2634. 
  2635. 
  2636. ngx_int_t
        ^
  2637. ngx_http_named_location(ngx_http_request_t *r, ngx_str_t *name)
  2638. {

src/http/ngx_http_core_module.c:2644:5: Assignment
  2642. 
  2643.     r->main->count++;
  2644.     r->uri_changes--;
            ^
  2645. 
  2646.     if (r->uri_changes == 0) {

src/http/ngx_http_upstream.c:2310:9: Call
2308.         }
2309. 
2310.         ngx_http_finalize_request(r, NGX_DONE);
              ^
2311.         return NGX_DONE;
2312.     }

src/http/ngx_http_request.c:2249:1: Parameter `r->uri_changes`
  2247. 
  2248. 
  2249. void
        ^
  2250. ngx_http_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
  2251. {

src/http/ngx_http_request.c:2416:9: Call
  2414.     }
  2415. 
  2416.     if (ngx_http_post_action(r) == NGX_OK) {
                ^
  2417.         return;
  2418.     }

src/http/ngx_http_request.c:3340:1: Parameter `r->uri_changes`
    3338. 
    3339. 
    3340. static ngx_int_t
          ^
    3341. ngx_http_post_action(ngx_http_request_t *r)
    3342. {

src/http/ngx_http_request.c:3367:9: Call
    3365. 
    3366.     if (clcf->post_action.data[0] == '/') {
    3367.         ngx_http_internal_redirect(r, &clcf->post_action, NULL);
                  ^
    3368. 
    3369.     } else {

src/http/ngx_http_core_module.c:2581:1: <LHS trace>
2579. 
2580. 
2581. ngx_int_t
      ^
2582. ngx_http_internal_redirect(ngx_http_request_t *r,
2583.     ngx_str_t *uri, ngx_str_t *args)

src/http/ngx_http_core_module.c:2581:1: Parameter `r->uri_changes`
      2579. 
      2580. 
      2581. ngx_int_t
            ^
      2582. ngx_http_internal_redirect(ngx_http_request_t *r,
      2583.     ngx_str_t *uri, ngx_str_t *args)

src/http/ngx_http_core_module.c:2587:5: Binary operation: ([0, -1+max(1, r->uri_changes)] - 1):unsigned32 by call to `ngx_http_finalize_request` 
      2585.     ngx_http_core_srv_conf_t  *cscf;
      2586. 
      2587.     r->uri_changes--;
                ^
      2588. 
      2589.     if (r->uri_changes == 0) {
