src/http/ngx_http_upstream.c:1020: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned32 by call to `ngx_http_upstream_finalize_request`.

src/http/ngx_http_upstream.c:1015:9: Call
1013. 
1014.     if (ctx->state) {
1015.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
              ^
1016.                       "%V could not be resolved (%i: %s)",
1017.                       &ctx->name, ctx->state,

src/core/ngx_log.c:95:1: Parameter `log->next->disk_full_time`
  93. #if (NGX_HAVE_VARIADIC_MACROS)
  94. 
  95. void
      ^
  96. ngx_log_error_core(ngx_uint_t level, ngx_log_t *log, ngx_err_t err,
  97.     const char *fmt, ...)

src/http/ngx_http_upstream.c:1020:9: Call
1018.                       ngx_resolver_strerror(ctx->state));
1019. 
1020.         ngx_http_upstream_finalize_request(r, u, NGX_HTTP_BAD_GATEWAY);
              ^
1021.         goto failed;
1022.     }

src/http/ngx_http_upstream.c:3923:1: Parameter `r->main->count`
  3921. 
  3922. 
  3923. static void
        ^
  3924. ngx_http_upstream_finalize_request(ngx_http_request_t *r,
  3925.     ngx_http_upstream_t *u, ngx_int_t rc)

src/http/ngx_http_upstream.c:3934:9: Call
  3932.     if (u->cleanup == NULL) {
  3933.         /* the request was already finalized */
  3934.         ngx_http_finalize_request(r, NGX_DONE);
                ^
  3935.         return;
  3936.     }

src/http/ngx_http_request.c:2249:1: <LHS trace>
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: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:2340:13: Binary operation: ([0, +oo] - 1):unsigned32 by call to `ngx_http_upstream_finalize_request` 
    2338.         if (r == c->data) {
    2339. 
    2340.             r->main->count--;
                      ^
    2341.             r->main->subrequests++;
    2342. 
