src/http/ngx_http_upstream.c:844: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64 by call to `ngx_http_upstream_connect`.

src/http/ngx_http_upstream.c:844:5: Call
842.     ur->ctx = NULL;
843. 
844.     ngx_http_upstream_connect(r, u);
         ^
845. }
846. 

src/http/ngx_http_upstream.c:1028:1: Parameter `r->uri.len`
  1026. 
  1027. 
  1028. static void
        ^
  1029. ngx_http_upstream_connect(ngx_http_request_t *r, ngx_http_upstream_t *u)
  1030. {

src/http/ngx_http_upstream.c:1159:5: Call
  1157. #endif
  1158. 
  1159.     ngx_http_upstream_send_request(r, u);
            ^
  1160. }
  1161. 

src/http/ngx_http_upstream.c:1298:1: Parameter `r->uri.len`
    1296. 
    1297. 
    1298. static void
          ^
    1299. ngx_http_upstream_send_request(ngx_http_request_t *r, ngx_http_upstream_t *u)
    1300. {

src/http/ngx_http_upstream.c:1369:9: Call
    1367.          */
    1368. 
    1369.         ngx_http_upstream_process_header(r, u);
                  ^
    1370.         return;
    1371.     }

src/http/ngx_http_upstream.c:1421:1: Parameter `r->uri.len`
      1419. 
      1420. 
      1421. static void
            ^
      1422. ngx_http_upstream_process_header(ngx_http_request_t *r, ngx_http_upstream_t *u)
      1423. {

src/http/ngx_http_upstream.c:1566:9: Call
      1564. 
      1565.     if (!r->subrequest_in_memory) {
      1566.         ngx_http_upstream_send_response(r, u);
                    ^
      1567.         return;
      1568.     }

src/http/ngx_http_upstream.c:1960:1: Parameter `r->uri.len`
        1958. 
        1959. 
        1960. static void
              ^
        1961. ngx_http_upstream_send_response(ngx_http_request_t *r, ngx_http_upstream_t *u)
        1962. {

src/http/ngx_http_upstream.c:1973:9: Call
        1971. 
        1972.     if (rc == NGX_ERROR || rc > NGX_OK || r->post_action) {
        1973.         ngx_http_upstream_finalize_request(r, u, rc);
                      ^
        1974.         return;
        1975.     }

src/http/ngx_http_upstream.c:2843:1: Parameter `r->uri.len`
          2841. 
          2842. 
          2843. static void
                ^
          2844. ngx_http_upstream_finalize_request(ngx_http_request_t *r,
          2845.     ngx_http_upstream_t *u, ngx_int_t rc)

src/http/ngx_http_upstream.c:2952:5: Call
          2950.     }
          2951. 
          2952.     ngx_http_finalize_request(r, rc);
                    ^
          2953. }
          2954. 

src/http/ngx_http_request.c:1847:1: Parameter `r->uri.len`
            1845. 
            1846. 
            1847. void
                  ^
            1848. ngx_http_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
            1849. {

src/http/ngx_http_request.c:1920:38: Call
            1918.         c->write->handler = ngx_http_request_handler;
            1919. 
            1920.         ngx_http_finalize_request(r, ngx_http_special_response_handler(r, rc));
                                                       ^
            1921.         return;
            1922.     }

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:2172:1: Parameter `r->uri.len`
                  2170. 
                  2171. 
                  2172. ngx_int_t
                        ^
                  2173. ngx_http_internal_redirect(ngx_http_request_t *r,
                  2174.     ngx_str_t *uri, ngx_str_t *args)

src/http/ngx_http_core_module.c:2203:5: Call
                  2201.                    "internal redirect: \"%V?%V\"", uri, &r->args);
                  2202. 
                  2203.     ngx_http_set_exten(r);
                            ^
                  2204. 
                  2205.     /* clear the modules contexts */

src/http/ngx_http_core_module.c:1681:1: <LHS trace>
1679. 
1680. 
1681. void
      ^
1682. ngx_http_set_exten(ngx_http_request_t *r)
1683. {

src/http/ngx_http_core_module.c:1681:1: Parameter `r->uri.len`
                    1679. 
                    1680. 
                    1681. void
                          ^
                    1682. ngx_http_set_exten(ngx_http_request_t *r)
                    1683. {

src/http/ngx_http_core_module.c:1689:10: Binary operation: ([0, +oo] - 1):unsigned64 by call to `ngx_http_upstream_connect` 
                    1687.     r->exten.data = NULL;
                    1688. 
                    1689.     for (i = r->uri.len - 1; i > 1; i--) {
                                   ^
                    1690.         if (r->uri.data[i] == '.' && r->uri.data[i - 1] != '/') {
                    1691. 
