src/http/ngx_http_upstream.c:823: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64 by call to `ngx_http_upstream_finalize_request`.

src/http/ngx_http_upstream.c:823:9: Call
821.                       ngx_resolver_strerror(ctx->state));
822. 
823.         ngx_http_upstream_finalize_request(r, u, NGX_HTTP_BAD_GATEWAY);
             ^
824.         return;
825.     }

src/http/ngx_http_upstream.c:2849:1: Parameter `r->uri.len`
  2847. 
  2848. 
  2849. static void
        ^
  2850. ngx_http_upstream_finalize_request(ngx_http_request_t *r,
  2851.     ngx_http_upstream_t *u, ngx_int_t rc)

src/http/ngx_http_upstream.c:2959:5: Call
  2957.     }
  2958. 
  2959.     ngx_http_finalize_request(r, rc);
            ^
  2960. }
  2961. 

src/http/ngx_http_request.c:1856:1: Parameter `r->uri.len`
    1854. 
    1855. 
    1856. void
          ^
    1857. ngx_http_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
    1858. {

src/http/ngx_http_request.c:1929:38: Call
    1927.         c->write->handler = ngx_http_request_handler;
    1928. 
    1929.         ngx_http_finalize_request(r, ngx_http_special_response_handler(r, rc));
                                               ^
    1930.         return;
    1931.     }

src/http/ngx_http_special_response.c:341:1: Parameter `r->uri.len`
      339. 
      340. 
      341. ngx_int_t
           ^
      342. ngx_http_special_response_handler(ngx_http_request_t *r, ngx_int_t error)
      343. {

src/http/ngx_http_special_response.c:391:24: Call
      389.         for (i = 0; i < clcf->error_pages->nelts; i++) {
      390.             if (err_page[i].status == error) {
      391.                 return ngx_http_send_error_page(r, &err_page[i]);
                                  ^
      392.             }
      393.         }

src/http/ngx_http_special_response.c:512:1: Parameter `r->uri.len`
        510. 
        511. 
        512. static ngx_int_t
             ^
        513. ngx_http_send_error_page(ngx_http_request_t *r, ngx_http_err_page_t *err_page)
        514. {

src/http/ngx_http_special_response.c:546:16: Call
        544.         }
        545. 
        546.         return ngx_http_internal_redirect(r, &uri, &args);
                            ^
        547.     }
        548. 

src/http/ngx_http_core_module.c:2275:1: Parameter `r->uri.len`
          2273. 
          2274. 
          2275. ngx_int_t
                ^
          2276. ngx_http_internal_redirect(ngx_http_request_t *r,
          2277.     ngx_str_t *uri, ngx_str_t *args)

src/http/ngx_http_core_module.c:2305:5: Call
          2303.                    "internal redirect: \"%V?%V\"", uri, &r->args);
          2304. 
          2305.     ngx_http_set_exten(r);
                    ^
          2306. 
          2307.     /* clear the modules contexts */

src/http/ngx_http_core_module.c:1715:1: <LHS trace>
1713. 
1714. 
1715. void
      ^
1716. ngx_http_set_exten(ngx_http_request_t *r)
1717. {

src/http/ngx_http_core_module.c:1715:1: Parameter `r->uri.len`
            1713. 
            1714. 
            1715. void
                  ^
            1716. ngx_http_set_exten(ngx_http_request_t *r)
            1717. {

src/http/ngx_http_core_module.c:1722:10: Binary operation: ([0, +oo] - 1):unsigned64 by call to `ngx_http_upstream_finalize_request` 
            1720.     ngx_str_null(&r->exten);
            1721. 
            1722.     for (i = r->uri.len - 1; i > 1; i--) {
                           ^
            1723.         if (r->uri.data[i] == '.' && r->uri.data[i - 1] != '/') {
            1724. 
