src/http/ngx_http_upstream.c:516: error: Integer Overflow L2
  ([0, `r->main->count` + 3] - 1):unsigned32 by call to `ngx_http_finalize_request`.

src/http/ngx_http_upstream.c:479:1: Parameter `r->main->count`
477. 
478. 
479. static void
     ^
480. ngx_http_upstream_init_request(ngx_http_request_t *r)
481. {

src/http/ngx_http_upstream.c:502:14: Call
500.         ngx_int_t  rc;
501. 
502.         rc = ngx_http_upstream_cache(r, u);
                  ^
503. 
504.         if (rc == NGX_BUSY) {

src/http/ngx_http_upstream.c:694:1: Parameter `r->main->count`
  692. #if (NGX_HTTP_CACHE)
  693. 
  694. static ngx_int_t
       ^
  695. ngx_http_upstream_cache(ngx_http_request_t *r, ngx_http_upstream_t *u)
  696. {

src/http/ngx_http_upstream.c:516:13: Call
514. 
515.         if (rc != NGX_DECLINED) {
516.             ngx_http_finalize_request(r, rc);
                 ^
517.             return;
518.         }

src/http/ngx_http_request.c:2251:1: Parameter `r->main->count`
  2249. 
  2250. 
  2251. void
        ^
  2252. ngx_http_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
  2253. {

src/http/ngx_http_request.c:2418:9: Call
  2416.     }
  2417. 
  2418.     if (ngx_http_post_action(r) == NGX_OK) {
                ^
  2419.         return;
  2420.     }

src/http/ngx_http_request.c:3336:1: <LHS trace>
3334. 
3335. 
3336. static ngx_int_t
      ^
3337. ngx_http_post_action(ngx_http_request_t *r)
3338. {

src/http/ngx_http_request.c:3336:1: Parameter `r->main->count`
    3334. 
    3335. 
    3336. static ngx_int_t
          ^
    3337. ngx_http_post_action(ngx_http_request_t *r)
    3338. {

src/http/ngx_http_request.c:3354:5: Binary operation: ([0, r->main->count + 3] - 1):unsigned32 by call to `ngx_http_finalize_request` 
    3352.                    "post action: \"%V\"", &clcf->post_action);
    3353. 
    3354.     r->main->count--;
              ^
    3355. 
    3356.     r->http_version = NGX_HTTP_VERSION_9;
