src/http/ngx_http_upstream.c:1976: error: Integer Overflow L2
  ([0, `r->uri.len`] - 1):unsigned64 by call to `ngx_http_upstream_intercept_errors`.

src/http/ngx_http_upstream.c:1840:1: Parameter `r->uri.len`
1838. 
1839. 
1840. static void
      ^
1841. ngx_http_upstream_process_header(ngx_http_request_t *r, ngx_http_upstream_t *u)
1842. {

src/http/ngx_http_upstream.c:1972:13: Call
1970.     if (u->headers_in.status_n >= NGX_HTTP_SPECIAL_RESPONSE) {
1971. 
1972.         if (ngx_http_upstream_test_next(r, u) == NGX_OK) {
                  ^
1973.             return;
1974.         }

src/http/ngx_http_upstream.c:2027:1: Parameter `r->uri.len`
  2025. 
  2026. 
  2027. static ngx_int_t
        ^
  2028. ngx_http_upstream_test_next(ngx_http_request_t *r, ngx_http_upstream_t *u)
  2029. {

src/http/ngx_http_upstream.c:1976:13: Call
1974.         }
1975. 
1976.         if (ngx_http_upstream_intercept_errors(r, u) == NGX_OK) {
                  ^
1977.             return;
1978.         }

src/http/ngx_http_upstream.c:2121:1: Parameter `r->uri.len`
  2119. 
  2120. 
  2121. static ngx_int_t
        ^
  2122. ngx_http_upstream_intercept_errors(ngx_http_request_t *r,
  2123.     ngx_http_upstream_t *u)

src/http/ngx_http_upstream.c:2134:9: Call
  2132. 
  2133.     if (status == NGX_HTTP_NOT_FOUND && u->conf->intercept_404) {
  2134.         ngx_http_upstream_finalize_request(r, u, NGX_HTTP_NOT_FOUND);
                ^
  2135.         return NGX_OK;
  2136.     }

src/http/ngx_http_upstream.c:3744:1: Parameter `r->uri.len`
    3742. 
    3743. 
    3744. static void
          ^
    3745. ngx_http_upstream_finalize_request(ngx_http_request_t *r,
    3746.     ngx_http_upstream_t *u, ngx_int_t rc)

src/http/ngx_http_upstream.c:3887:9: Call
    3885. 
    3886.     if (r->header_only) {
    3887.         ngx_http_finalize_request(r, rc);
                  ^
    3888.         return;
    3889.     }

src/http/ngx_http_request.c:2249:1: Parameter `r->uri.len`
      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:2321:38: Call
      2319.         c->write->handler = ngx_http_request_handler;
      2320. 
      2321.         ngx_http_finalize_request(r, ngx_http_special_response_handler(r, rc));
                                                 ^
      2322.         return;
      2323.     }

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:2581:1: Parameter `r->uri.len`
            2579. 
            2580. 
            2581. ngx_int_t
                  ^
            2582. ngx_http_internal_redirect(ngx_http_request_t *r,
            2583.     ngx_str_t *uri, ngx_str_t *args)

src/http/ngx_http_core_module.c:2611:5: Call
            2609.                    "internal redirect: \"%V?%V\"", uri, &r->args);
            2610. 
            2611.     ngx_http_set_exten(r);
                      ^
            2612. 
            2613.     /* clear the modules contexts */

src/http/ngx_http_core_module.c:1778:1: <LHS trace>
1776. 
1777. 
1778. void
      ^
1779. ngx_http_set_exten(ngx_http_request_t *r)
1780. {

src/http/ngx_http_core_module.c:1778:1: Parameter `r->uri.len`
              1776. 
              1777. 
              1778. void
                    ^
              1779. ngx_http_set_exten(ngx_http_request_t *r)
              1780. {

src/http/ngx_http_core_module.c:1785:10: Binary operation: ([0, r->uri.len] - 1):unsigned64 by call to `ngx_http_upstream_intercept_errors` 
              1783.     ngx_str_null(&r->exten);
              1784. 
              1785.     for (i = r->uri.len - 1; i > 1; i--) {
                             ^
              1786.         if (r->uri.data[i] == '.' && r->uri.data[i - 1] != '/') {
              1787. 
