src/http/ngx_http_upstream.c:984: error: Integer Overflow L1
  (0 - 1):unsigned32 by call to `ngx_http_upstream_connect`.

src/http/ngx_http_upstream.c:982:5: Assignment
980. 
981.     ngx_resolve_name_done(ctx);
982.     ur->ctx = NULL;
         ^
983. 
984.     ngx_http_upstream_connect(r, u);

src/http/ngx_http_upstream.c:984:5: Call
982.     ur->ctx = NULL;
983. 
984.     ngx_http_upstream_connect(r, u);
         ^
985. 
986. failed:

src/http/ngx_http_upstream.c:1227:1: Parameter `r->main->count`
  1225. 
  1226. 
  1227. static void
        ^
  1228. ngx_http_upstream_connect(ngx_http_request_t *r, ngx_http_upstream_t *u)
  1229. {

src/http/ngx_http_upstream.c:1244:9: Call
  1242.     u->state = ngx_array_push(r->upstream_states);
  1243.     if (u->state == NULL) {
  1244.         ngx_http_upstream_finalize_request(r, u,
                ^
  1245.                                            NGX_HTTP_INTERNAL_SERVER_ERROR);
  1246.         return;

src/http/ngx_http_upstream.c:3642:1: Parameter `r->main->count`
    3640. 
    3641. 
    3642. static void
          ^
    3643. ngx_http_upstream_finalize_request(ngx_http_request_t *r,
    3644.     ngx_http_upstream_t *u, ngx_int_t rc)

src/http/ngx_http_upstream.c:3781:9: Call
    3779. 
    3780.     if (r->header_only) {
    3781.         ngx_http_finalize_request(r, rc);
                  ^
    3782.         return;
    3783.     }

src/http/ngx_http_request.c:2252:1: Parameter `r->main->count`
      2250. 
      2251. 
      2252. void
            ^
      2253. ngx_http_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
      2254. {

src/http/ngx_http_request.c:2290:13: Call
      2288.         || c->error)
      2289.     {
      2290.         if (ngx_http_post_action(r) == NGX_OK) {
                        ^
      2291.             return;
      2292.         }

src/http/ngx_http_request.c:3343:1: <LHS trace>
3341. 
3342. 
3343. static ngx_int_t
      ^
3344. ngx_http_post_action(ngx_http_request_t *r)
3345. {

src/http/ngx_http_request.c:3343:1: Parameter `r->main->count`
        3341. 
        3342. 
        3343. static ngx_int_t
              ^
        3344. ngx_http_post_action(ngx_http_request_t *r)
        3345. {

src/http/ngx_http_request.c:3361:5: Binary operation: (0 - 1):unsigned32 by call to `ngx_http_upstream_connect` 
        3359.                    "post action: \"%V\"", &clcf->post_action);
        3360. 
        3361.     r->main->count--;
                  ^
        3362. 
        3363.     r->http_version = NGX_HTTP_VERSION_9;
