src/http/ngx_http_upstream.c:565: error: Integer Overflow L2
  ([0, `r->main->count` + 3] - 1):unsigned32 by call to `ngx_http_upstream_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:565:13: Call
563.         u->state = ngx_array_push(r->upstream_states);
564.         if (u->state == NULL) {
565.             ngx_http_upstream_finalize_request(r, u,
                 ^
566.                                                NGX_HTTP_INTERNAL_SERVER_ERROR);
567.             return;

src/http/ngx_http_upstream.c:3536:1: Parameter `r->main->count`
  3534. 
  3535. 
  3536. static void
        ^
  3537. ngx_http_upstream_finalize_request(ngx_http_request_t *r,
  3538.     ngx_http_upstream_t *u, ngx_int_t rc)

src/http/ngx_http_upstream.c:3675:9: Call
  3673. 
  3674.     if (r->header_only) {
  3675.         ngx_http_finalize_request(r, rc);
                ^
  3676.         return;
  3677.     }

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_upstream_finalize_request` 
      3352.                    "post action: \"%V\"", &clcf->post_action);
      3353. 
      3354.     r->main->count--;
                ^
      3355. 
      3356.     r->http_version = NGX_HTTP_VERSION_9;
