src/http/ngx_http_upstream.c:805: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64 by call to `ngx_http_finalize_request`.

src/http/ngx_http_upstream.c:805:9: Call
803. 
804.         ngx_resolve_name_done(ctx);
805.         ngx_http_finalize_request(r, NGX_HTTP_BAD_GATEWAY);
             ^
806.         return;
807.     }

src/http/ngx_http_request.c:1831:1: Parameter `r->uri.len`
  1829. 
  1830. 
  1831. void
        ^
  1832. ngx_http_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
  1833. {

src/http/ngx_http_request.c:1904:38: Call
  1902.         c->write->handler = ngx_http_request_handler;
  1903. 
  1904.         ngx_http_finalize_request(r, ngx_http_special_response_handler(r, rc));
                                             ^
  1905.         return;
  1906.     }

src/http/ngx_http_special_response.c:333:1: Parameter `r->uri.len`
    331. 
    332. 
    333. ngx_int_t
         ^
    334. ngx_http_special_response_handler(ngx_http_request_t *r, ngx_int_t error)
    335. {

src/http/ngx_http_special_response.c:383:24: Call
    381.         for (i = 0; i < clcf->error_pages->nelts; i++) {
    382.             if (err_page[i].status == error) {
    383.                 return ngx_http_send_error_page(r, &err_page[i]);
                                ^
    384.             }
    385.         }

src/http/ngx_http_special_response.c:504:1: Parameter `r->uri.len`
      502. 
      503. 
      504. static ngx_int_t
           ^
      505. ngx_http_send_error_page(ngx_http_request_t *r, ngx_http_err_page_t *err_page)
      506. {

src/http/ngx_http_special_response.c:540:16: Call
      538.         }
      539. 
      540.         return ngx_http_internal_redirect(r, &uri, &args);
                          ^
      541.     }
      542. 

src/http/ngx_http_core_module.c:2163:1: Parameter `r->uri.len`
        2161. 
        2162. 
        2163. ngx_int_t
              ^
        2164. ngx_http_internal_redirect(ngx_http_request_t *r,
        2165.     ngx_str_t *uri, ngx_str_t *args)

src/http/ngx_http_core_module.c:2194:5: Call
        2192.                    "internal redirect: \"%V?%V\"", uri, &r->args);
        2193. 
        2194.     ngx_http_set_exten(r);
                  ^
        2195. 
        2196.     /* clear the modules contexts */

src/http/ngx_http_core_module.c:1672:1: <LHS trace>
1670. 
1671. 
1672. void
      ^
1673. ngx_http_set_exten(ngx_http_request_t *r)
1674. {

src/http/ngx_http_core_module.c:1672:1: Parameter `r->uri.len`
          1670. 
          1671. 
          1672. void
                ^
          1673. ngx_http_set_exten(ngx_http_request_t *r)
          1674. {

src/http/ngx_http_core_module.c:1680:10: Binary operation: ([0, +oo] - 1):unsigned64 by call to `ngx_http_finalize_request` 
          1678.     r->exten.data = NULL;
          1679. 
          1680.     for (i = r->uri.len - 1; i > 1; i--) {
                         ^
          1681.         if (r->uri.data[i] == '.' && r->uri.data[i - 1] != '/') {
          1682. 
