src/http/ngx_http_upstream.c:938: error: Integer Overflow L1
  (0 - 1):unsigned32 by call to `ngx_http_upstream_connect`.

src/http/ngx_http_upstream.c:936:5: Assignment
934. 
935.     ngx_resolve_name_done(ctx);
936.     ur->ctx = NULL;
         ^
937. 
938.     ngx_http_upstream_connect(r, u);

src/http/ngx_http_upstream.c:938:5: Call
936.     ur->ctx = NULL;
937. 
938.     ngx_http_upstream_connect(r, u);
         ^
939. 
940. failed:

src/http/ngx_http_upstream.c:1132:1: Parameter `r->main->count`
  1130. 
  1131. 
  1132. static void
        ^
  1133. ngx_http_upstream_connect(ngx_http_request_t *r, ngx_http_upstream_t *u)
  1134. {

src/http/ngx_http_upstream.c:1149:9: Call
  1147.     u->state = ngx_array_push(r->upstream_states);
  1148.     if (u->state == NULL) {
  1149.         ngx_http_upstream_finalize_request(r, u,
                ^
  1150.                                            NGX_HTTP_INTERNAL_SERVER_ERROR);
  1151.         return;

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:3416:9: Call
    3414.         || rc == NGX_HTTP_CLIENT_CLOSED_REQUEST)
    3415.     {
    3416.         ngx_http_finalize_request(r, rc);
                  ^
    3417.         return;
    3418.     }

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 - 1):unsigned32 by call to `ngx_http_upstream_connect` 
        3272.                    "post action: \"%V\"", &clcf->post_action);
        3273. 
        3274.     r->main->count--;
                  ^
        3275. 
        3276.     r->http_version = NGX_HTTP_VERSION_9;
