src/http/ngx_http_upstream.c:630: error: Integer Overflow L2
  ([0, `r->main->count` + 3] - 1):unsigned32 by call to `ngx_http_upstream_connect`.

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:630:13: Call
628.             }
629. 
630.             ngx_http_upstream_connect(r, u);
                 ^
631. 
632.             return;

src/http/ngx_http_upstream.c:1296:1: Parameter `r->main->count`
  1294. 
  1295. 
  1296. static void
        ^
  1297. ngx_http_upstream_connect(ngx_http_request_t *r, ngx_http_upstream_t *u)
  1298. {

src/http/ngx_http_upstream.c:1340:9: Call
  1338.     if (rc == NGX_BUSY) {
  1339.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "no live upstreams");
  1340.         ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_NOLIVE);
                ^
  1341.         return;
  1342.     }

src/http/ngx_http_upstream.c:3602:1: Parameter `r->main->count`
    3600. 
    3601. 
    3602. static void
          ^
    3603. ngx_http_upstream_next(ngx_http_request_t *r, ngx_http_upstream_t *u,
    3604.     ngx_uint_t ft_type)

src/http/ngx_http_upstream.c:3669:9: Call
    3667. 
    3668.     if (r->connection->error) {
    3669.         ngx_http_upstream_finalize_request(r, u,
                  ^
    3670.                                            NGX_HTTP_CLIENT_CLOSED_REQUEST);
    3671.         return;

src/http/ngx_http_upstream.c:3744:1: Parameter `r->main->count`
      3742. 
      3743. 
      3744. static void
            ^
      3745. ngx_http_upstream_finalize_request(ngx_http_request_t *r,
      3746.     ngx_http_upstream_t *u, ngx_int_t rc)

src/http/ngx_http_upstream.c:3756:9: Call
      3754.     if (u->cleanup == NULL) {
      3755.         /* the request was already finalized */
      3756.         ngx_http_finalize_request(r, NGX_DONE);
                    ^
      3757.         return;
      3758.     }

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_upstream_connect` 
          3356.                    "post action: \"%V\"", &clcf->post_action);
          3357. 
          3358.     r->main->count--;
                    ^
          3359. 
          3360.     r->http_version = NGX_HTTP_VERSION_9;
