src/http/ngx_http_upstream.c:538: error: Integer Overflow L2
  ([0, `r->main->count` + 3] - 1):unsigned32 by call to `ngx_http_finalize_request`.

src/http/ngx_http_upstream.c:501:1: Parameter `r->main->count`
499. 
500. 
501. static void
     ^
502. ngx_http_upstream_init_request(ngx_http_request_t *r)
503. {

src/http/ngx_http_upstream.c:524:14: Call
522.         ngx_int_t  rc;
523. 
524.         rc = ngx_http_upstream_cache(r, u);
                  ^
525. 
526.         if (rc == NGX_BUSY) {

src/http/ngx_http_upstream.c:730:1: Parameter `r->main->count`
  728. #if (NGX_HTTP_CACHE)
  729. 
  730. static ngx_int_t
       ^
  731. ngx_http_upstream_cache(ngx_http_request_t *r, ngx_http_upstream_t *u)
  732. {

src/http/ngx_http_upstream.c:538:13: Call
536. 
537.         if (rc == NGX_ERROR) {
538.             ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
                 ^
539.             return;
540.         }

src/http/ngx_http_request.c:2249:1: Parameter `r->main->count`
  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:2287:13: Call
  2285.         || c->error)
  2286.     {
  2287.         if (ngx_http_post_action(r) == NGX_OK) {
                    ^
  2288.             return;
  2289.         }

src/http/ngx_http_request.c:3340:1: <LHS trace>
3338. 
3339. 
3340. static ngx_int_t
      ^
3341. ngx_http_post_action(ngx_http_request_t *r)
3342. {

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

src/http/ngx_http_request.c:3358:5: Binary operation: ([0, r->main->count + 3] - 1):unsigned32 by call to `ngx_http_finalize_request` 
    3356.                    "post action: \"%V\"", &clcf->post_action);
    3357. 
    3358.     r->main->count--;
              ^
    3359. 
    3360.     r->http_version = NGX_HTTP_VERSION_9;
