src/http/ngx_http_upstream.c:1230: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64 by call to `ngx_http_upstream_connect`.

src/http/ngx_http_upstream.c:1230:5: Call
1228.     }
1229. 
1230.     ngx_http_upstream_connect(r, u);
          ^
1231. 
1232. failed:

src/http/ngx_http_upstream.c:1482:1: Parameter `r->uri.len`
  1480. 
  1481. 
  1482. static void
        ^
  1483. ngx_http_upstream_connect(ngx_http_request_t *r, ngx_http_upstream_t *u)
  1484. {

src/http/ngx_http_upstream.c:1621:5: Call
  1619. #endif
  1620. 
  1621.     ngx_http_upstream_send_request(r, u, 1);
            ^
  1622. }
  1623. 

src/http/ngx_http_upstream.c:1941:1: Parameter `r->uri.len`
    1939. 
    1940. 
    1941. static void
          ^
    1942. ngx_http_upstream_send_request(ngx_http_request_t *r, ngx_http_upstream_t *u,
    1943.     ngx_uint_t do_write)

src/http/ngx_http_upstream.c:1967:9: Call
    1965. 
    1966.     if (rc == NGX_ERROR) {
    1967.         ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR);
                  ^
    1968.         return;
    1969.     }

src/http/ngx_http_upstream.c:4083:1: Parameter `r->uri.len`
      4081. 
      4082. 
      4083. static void
            ^
      4084. ngx_http_upstream_next(ngx_http_request_t *r, ngx_http_upstream_t *u,
      4085.     ngx_uint_t ft_type)

src/http/ngx_http_upstream.c:4155:9: Call
      4153. 
      4154.     if (r->connection->error) {
      4155.         ngx_http_upstream_finalize_request(r, u,
                    ^
      4156.                                            NGX_HTTP_CLIENT_CLOSED_REQUEST);
      4157.         return;

src/http/ngx_http_upstream.c:4247:1: Parameter `r->uri.len`
        4245. 
        4246. 
        4247. static void
              ^
        4248. ngx_http_upstream_finalize_request(ngx_http_request_t *r,
        4249.     ngx_http_upstream_t *u, ngx_int_t rc)

src/http/ngx_http_upstream.c:4258:9: Call
        4256.     if (u->cleanup == NULL) {
        4257.         /* the request was already finalized */
        4258.         ngx_http_finalize_request(r, NGX_DONE);
                      ^
        4259.         return;
        4260.     }

src/http/ngx_http_request.c:2307:1: Parameter `r->uri.len`
          2305. 
          2306. 
          2307. void
                ^
          2308. ngx_http_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
          2309. {

src/http/ngx_http_request.c:2375:38: Call
          2373.         c->write->handler = ngx_http_request_handler;
          2374. 
          2375.         ngx_http_finalize_request(r, ngx_http_special_response_handler(r, rc));
                                                     ^
          2376.         return;
          2377.     }

src/http/ngx_http_special_response.c:415:1: Parameter `r->uri.len`
            413. 
            414. 
            415. ngx_int_t
                 ^
            416. ngx_http_special_response_handler(ngx_http_request_t *r, ngx_int_t error)
            417. {

src/http/ngx_http_special_response.c:466:24: Call
            464.         for (i = 0; i < clcf->error_pages->nelts; i++) {
            465.             if (err_page[i].status == error) {
            466.                 return ngx_http_send_error_page(r, &err_page[i]);
                                        ^
            467.             }
            468.         }

src/http/ngx_http_special_response.c:583:1: Parameter `r->uri.len`
              581. 
              582. 
              583. static ngx_int_t
                   ^
              584. ngx_http_send_error_page(ngx_http_request_t *r, ngx_http_err_page_t *err_page)
              585. {

src/http/ngx_http_special_response.c:619:16: Call
              617.         }
              618. 
              619.         return ngx_http_internal_redirect(r, &uri, &args);
                                  ^
              620.     }
              621. 

src/http/ngx_http_core_module.c:2378:1: Parameter `r->uri.len`
                2376. 
                2377. 
                2378. ngx_int_t
                      ^
                2379. ngx_http_internal_redirect(ngx_http_request_t *r,
                2380.     ngx_str_t *uri, ngx_str_t *args)

src/http/ngx_http_core_module.c:2408:5: Call
                2406.                    "internal redirect: \"%V?%V\"", uri, &r->args);
                2407. 
                2408.     ngx_http_set_exten(r);
                          ^
                2409. 
                2410.     /* clear the modules contexts */

src/http/ngx_http_core_module.c:1550:1: <LHS trace>
1548. 
1549. 
1550. void
      ^
1551. ngx_http_set_exten(ngx_http_request_t *r)
1552. {

src/http/ngx_http_core_module.c:1550:1: Parameter `r->uri.len`
                  1548. 
                  1549. 
                  1550. void
                        ^
                  1551. ngx_http_set_exten(ngx_http_request_t *r)
                  1552. {

src/http/ngx_http_core_module.c:1557:10: Binary operation: ([0, +oo] - 1):unsigned64 by call to `ngx_http_upstream_connect` 
                  1555.     ngx_str_null(&r->exten);
                  1556. 
                  1557.     for (i = r->uri.len - 1; i > 1; i--) {
                                 ^
                  1558.         if (r->uri.data[i] == '.' && r->uri.data[i - 1] != '/') {
                  1559. 
