src/http/ngx_http_upstream.c:459: error: Integer Overflow L2
  ([0, `r->main->count` + 3] - 1):unsigned32 by call to `ngx_http_finalize_request`.

src/http/ngx_http_upstream.c:422:1: Parameter `r->main->count`
420. 
421. 
422. static void
     ^
423. ngx_http_upstream_init_request(ngx_http_request_t *r)
424. {

src/http/ngx_http_upstream.c:445:14: Call
443.         ngx_int_t  rc;
444. 
445.         rc = ngx_http_upstream_cache(r, u);
                  ^
446. 
447.         if (rc == NGX_BUSY) {

src/http/ngx_http_upstream.c:609:1: Parameter `r->main->count`
  607. #if (NGX_HTTP_CACHE)
  608. 
  609. static ngx_int_t
       ^
  610. ngx_http_upstream_cache(ngx_http_request_t *r, ngx_http_upstream_t *u)
  611. {

src/http/ngx_http_upstream.c:459:13: Call
457. 
458.         if (rc != NGX_DECLINED) {
459.             ngx_http_finalize_request(r, rc);
                 ^
460.             return;
461.         }

src/http/ngx_http_request.c:1831:1: Parameter `r->main->count`
  1829. 
  1830. 
  1831. void
        ^
  1832. ngx_http_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
  1833. {

src/http/ngx_http_request.c:1870:13: Call
  1868.         || c->error)
  1869.     {
  1870.         if (ngx_http_post_action(r) == NGX_OK) {
                    ^
  1871.             return;
  1872.         }

src/http/ngx_http_request.c:2809:1: <LHS trace>
2807. 
2808. 
2809. static ngx_int_t
      ^
2810. ngx_http_post_action(ngx_http_request_t *r)
2811. {

src/http/ngx_http_request.c:2809:1: Parameter `r->main->count`
    2807. 
    2808. 
    2809. static ngx_int_t
          ^
    2810. ngx_http_post_action(ngx_http_request_t *r)
    2811. {

src/http/ngx_http_request.c:2823:5: Binary operation: ([0, r->main->count + 3] - 1):unsigned32 by call to `ngx_http_finalize_request` 
    2821.                    "post action: \"%V\"", &clcf->post_action);
    2822. 
    2823.     r->main->count--;
              ^
    2824. 
    2825.     r->http_version = NGX_HTTP_VERSION_9;
