src/http/ngx_http_upstream.c:1672: error: Integer Overflow L2
  ([0, `r->main->count` + 8] - 1):unsigned32 by call to `ngx_http_upstream_send_response`.

src/http/ngx_http_upstream.c:1527:1: Parameter `r->main->count`
1525. 
1526. 
1527. static void
      ^
1528. ngx_http_upstream_process_header(ngx_http_request_t *r, ngx_http_upstream_t *u)
1529. {

src/http/ngx_http_upstream.c:1667:9: Call
1665.     }
1666. 
1667.     if (ngx_http_upstream_process_headers(r, u) != NGX_OK) {
              ^
1668.         return;
1669.     }

src/http/ngx_http_upstream.c:1881:1: Parameter `r->main->count`
  1879. 
  1880. 
  1881. static ngx_int_t
        ^
  1882. ngx_http_upstream_process_headers(ngx_http_request_t *r, ngx_http_upstream_t *u)
  1883. {

src/http/ngx_http_upstream.c:1672:9: Call
1670. 
1671.     if (!r->subrequest_in_memory) {
1672.         ngx_http_upstream_send_response(r, u);
              ^
1673.         return;
1674.     }

src/http/ngx_http_upstream.c:2080:1: Parameter `r->main->count`
  2078. 
  2079. 
  2080. static void
        ^
  2081. ngx_http_upstream_send_response(ngx_http_request_t *r, ngx_http_upstream_t *u)
  2082. {

src/http/ngx_http_upstream.c:2180:13: Call
  2178.             }
  2179. 
  2180.             ngx_http_upstream_process_non_buffered_downstream(r);
                    ^
  2181. 
  2182.         } else {

src/http/ngx_http_upstream.c:2662:1: Parameter `r->main->count`
    2660. 
    2661. 
    2662. static void
          ^
    2663. ngx_http_upstream_process_non_buffered_downstream(ngx_http_request_t *r)
    2664. {

src/http/ngx_http_upstream.c:2685:5: Call
    2683.     }
    2684. 
    2685.     ngx_http_upstream_process_non_buffered_request(r, 1);
              ^
    2686. }
    2687. 

src/http/ngx_http_upstream.c:2712:1: Parameter `r->main->count`
      2710. 
      2711. 
      2712. static void
            ^
      2713. ngx_http_upstream_process_non_buffered_request(ngx_http_request_t *r,
      2714.     ngx_uint_t do_write)

src/http/ngx_http_upstream.c:2753:21: Call
      2751.                     || (upstream->read->eof && u->length == -1))
      2752.                 {
      2753.                     ngx_http_upstream_finalize_request(r, u, 0);
                                ^
      2754.                     return;
      2755.                 }

src/http/ngx_http_upstream.c:3296:1: Parameter `r->main->count`
        3294. 
        3295. 
        3296. static void
              ^
        3297. ngx_http_upstream_finalize_request(ngx_http_request_t *r,
        3298.     ngx_http_upstream_t *u, ngx_int_t rc)

src/http/ngx_http_upstream.c:3425:9: Call
        3423. 
        3424.     if (r->header_only) {
        3425.         ngx_http_finalize_request(r, rc);
                      ^
        3426.         return;
        3427.     }

src/http/ngx_http_request.c:2198:1: Parameter `r->main->count`
          2196. 
          2197. 
          2198. void
                ^
          2199. ngx_http_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
          2200. {

src/http/ngx_http_request.c:2236:13: Call
          2234.         || c->error)
          2235.     {
          2236.         if (ngx_http_post_action(r) == NGX_OK) {
                            ^
          2237.             return;
          2238.         }

src/http/ngx_http_request.c:3256:1: <LHS trace>
3254. 
3255. 
3256. static ngx_int_t
      ^
3257. ngx_http_post_action(ngx_http_request_t *r)
3258. {

src/http/ngx_http_request.c:3256:1: Parameter `r->main->count`
            3254. 
            3255. 
            3256. static ngx_int_t
                  ^
            3257. ngx_http_post_action(ngx_http_request_t *r)
            3258. {

src/http/ngx_http_request.c:3274:5: Binary operation: ([0, r->main->count + 8] - 1):unsigned32 by call to `ngx_http_upstream_send_response` 
            3272.                    "post action: \"%V\"", &clcf->post_action);
            3273. 
            3274.     r->main->count--;
                      ^
            3275. 
            3276.     r->http_version = NGX_HTTP_VERSION_9;
