src/http/ngx_http_upstream.c:531: error: Integer Overflow L2
  ([0, `r->main->count` + 3] - 1):unsigned32 by call to `ngx_http_finalize_request`.

src/http/ngx_http_upstream.c:494:1: Parameter `r->main->count`
492. 
493. 
494. static void
     ^
495. ngx_http_upstream_init_request(ngx_http_request_t *r)
496. {

src/http/ngx_http_upstream.c:517:14: Call
515.         ngx_int_t  rc;
516. 
517.         rc = ngx_http_upstream_cache(r, u);
                  ^
518. 
519.         if (rc == NGX_BUSY) {

src/http/ngx_http_upstream.c:723:1: Parameter `r->main->count`
  721. #if (NGX_HTTP_CACHE)
  722. 
  723. static ngx_int_t
       ^
  724. ngx_http_upstream_cache(ngx_http_request_t *r, ngx_http_upstream_t *u)
  725. {

src/http/ngx_http_upstream.c:531:13: Call
529. 
530.         if (rc == NGX_ERROR) {
531.             ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
                 ^
532.             return;
533.         }

src/http/ngx_http_request.c:2252:1: Parameter `r->main->count`
  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:2419:9: Call
  2417.     }
  2418. 
  2419.     if (ngx_http_post_action(r) == NGX_OK) {
                ^
  2420.         return;
  2421.     }

src/http/ngx_http_request.c:3343:1: <LHS trace>
3341. 
3342. 
3343. static ngx_int_t
      ^
3344. ngx_http_post_action(ngx_http_request_t *r)
3345. {

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

src/http/ngx_http_request.c:3361:5: Binary operation: ([0, r->main->count + 3] - 1):unsigned32 by call to `ngx_http_finalize_request` 
    3359.                    "post action: \"%V\"", &clcf->post_action);
    3360. 
    3361.     r->main->count--;
              ^
    3362. 
    3363.     r->http_version = NGX_HTTP_VERSION_9;
