src/http/ngx_http_upstream.c:1854: error: Integer Overflow L2
  ([0, `r->uri.len`] - 1):unsigned64 by call to `ngx_http_upstream_intercept_errors`.

src/http/ngx_http_upstream.c:1723:1: Parameter `r->uri.len`
1721. 
1722. 
1723. static void
      ^
1724. ngx_http_upstream_process_header(ngx_http_request_t *r, ngx_http_upstream_t *u)
1725. {

src/http/ngx_http_upstream.c:1850:13: Call
1848.     if (u->headers_in.status_n >= NGX_HTTP_SPECIAL_RESPONSE) {
1849. 
1850.         if (ngx_http_upstream_test_next(r, u) == NGX_OK) {
                  ^
1851.             return;
1852.         }

src/http/ngx_http_upstream.c:1905:1: Parameter `r->uri.len`
  1903. 
  1904. 
  1905. static ngx_int_t
        ^
  1906. ngx_http_upstream_test_next(ngx_http_request_t *r, ngx_http_upstream_t *u)
  1907. {

src/http/ngx_http_upstream.c:1854:13: Call
1852.         }
1853. 
1854.         if (ngx_http_upstream_intercept_errors(r, u) == NGX_OK) {
                  ^
1855.             return;
1856.         }

src/http/ngx_http_upstream.c:1999:1: Parameter `r->uri.len`
  1997. 
  1998. 
  1999. static ngx_int_t
        ^
  2000. ngx_http_upstream_intercept_errors(ngx_http_request_t *r,
  2001.     ngx_http_upstream_t *u)

src/http/ngx_http_upstream.c:2037:21: Call
  2035. 
  2036.                 if (h == NULL) {
  2037.                     ngx_http_upstream_finalize_request(r, u,
                            ^
  2038.                                                NGX_HTTP_INTERNAL_SERVER_ERROR);
  2039.                     return NGX_OK;

src/http/ngx_http_upstream.c:3536:1: Parameter `r->uri.len`
    3534. 
    3535. 
    3536. static void
          ^
    3537. ngx_http_upstream_finalize_request(ngx_http_request_t *r,
    3538.     ngx_http_upstream_t *u, ngx_int_t rc)

src/http/ngx_http_upstream.c:3675:9: Call
    3673. 
    3674.     if (r->header_only) {
    3675.         ngx_http_finalize_request(r, rc);
                  ^
    3676.         return;
    3677.     }

src/http/ngx_http_request.c:2251:1: Parameter `r->uri.len`
      2249. 
      2250. 
      2251. void
            ^
      2252. ngx_http_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
      2253. {

src/http/ngx_http_request.c:2323:38: Call
      2321.         c->write->handler = ngx_http_request_handler;
      2322. 
      2323.         ngx_http_finalize_request(r, ngx_http_special_response_handler(r, rc));
                                                 ^
      2324.         return;
      2325.     }

src/http/ngx_http_special_response.c:365:1: Parameter `r->uri.len`
        363. 
        364. 
        365. ngx_int_t
             ^
        366. ngx_http_special_response_handler(ngx_http_request_t *r, ngx_int_t error)
        367. {

src/http/ngx_http_special_response.c:416:24: Call
        414.         for (i = 0; i < clcf->error_pages->nelts; i++) {
        415.             if (err_page[i].status == error) {
        416.                 return ngx_http_send_error_page(r, &err_page[i]);
                                    ^
        417.             }
        418.         }

src/http/ngx_http_special_response.c:534:1: Parameter `r->uri.len`
          532. 
          533. 
          534. static ngx_int_t
               ^
          535. ngx_http_send_error_page(ngx_http_request_t *r, ngx_http_err_page_t *err_page)
          536. {

src/http/ngx_http_special_response.c:570:16: Call
          568.         }
          569. 
          570.         return ngx_http_internal_redirect(r, &uri, &args);
                              ^
          571.     }
          572. 

src/http/ngx_http_core_module.c:2561:1: Parameter `r->uri.len`
            2559. 
            2560. 
            2561. ngx_int_t
                  ^
            2562. ngx_http_internal_redirect(ngx_http_request_t *r,
            2563.     ngx_str_t *uri, ngx_str_t *args)

src/http/ngx_http_core_module.c:2591:5: Call
            2589.                    "internal redirect: \"%V?%V\"", uri, &r->args);
            2590. 
            2591.     ngx_http_set_exten(r);
                      ^
            2592. 
            2593.     /* clear the modules contexts */

src/http/ngx_http_core_module.c:1797:1: <LHS trace>
1795. 
1796. 
1797. void
      ^
1798. ngx_http_set_exten(ngx_http_request_t *r)
1799. {

src/http/ngx_http_core_module.c:1797:1: Parameter `r->uri.len`
              1795. 
              1796. 
              1797. void
                    ^
              1798. ngx_http_set_exten(ngx_http_request_t *r)
              1799. {

src/http/ngx_http_core_module.c:1804:10: Binary operation: ([0, r->uri.len] - 1):unsigned64 by call to `ngx_http_upstream_intercept_errors` 
              1802.     ngx_str_null(&r->exten);
              1803. 
              1804.     for (i = r->uri.len - 1; i > 1; i--) {
                             ^
              1805.         if (r->uri.data[i] == '.' && r->uri.data[i - 1] != '/') {
              1806. 
