src/http/ngx_http_upstream.c:993: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64 by call to `ngx_http_upstream_connect`.

src/http/ngx_http_upstream.c:993:5: Call
991.     }
992. 
993.     ngx_http_upstream_connect(r, u);
         ^
994. 
995. failed:

src/http/ngx_http_upstream.c:1236:1: Parameter `r->uri.len`
  1234. 
  1235. 
  1236. static void
        ^
  1237. ngx_http_upstream_connect(ngx_http_request_t *r, ngx_http_upstream_t *u)
  1238. {

src/http/ngx_http_upstream.c:1279:9: Call
  1277.     if (rc == NGX_BUSY) {
  1278.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "no live upstreams");
  1279.         ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_NOLIVE);
                ^
  1280.         return;
  1281.     }

src/http/ngx_http_upstream.c:3516:1: Parameter `r->uri.len`
    3514. 
    3515. 
    3516. static void
          ^
    3517. ngx_http_upstream_next(ngx_http_request_t *r, ngx_http_upstream_t *u,
    3518.     ngx_uint_t ft_type)

src/http/ngx_http_upstream.c:3583:9: Call
    3581. 
    3582.     if (r->connection->error) {
    3583.         ngx_http_upstream_finalize_request(r, u,
                  ^
    3584.                                            NGX_HTTP_CLIENT_CLOSED_REQUEST);
    3585.         return;

src/http/ngx_http_upstream.c:3658:1: Parameter `r->uri.len`
      3656. 
      3657. 
      3658. static void
            ^
      3659. ngx_http_upstream_finalize_request(ngx_http_request_t *r,
      3660.     ngx_http_upstream_t *u, ngx_int_t rc)

src/http/ngx_http_upstream.c:3797:9: Call
      3795. 
      3796.     if (r->header_only) {
      3797.         ngx_http_finalize_request(r, rc);
                    ^
      3798.         return;
      3799.     }

src/http/ngx_http_request.c:2252:1: Parameter `r->uri.len`
        2250. 
        2251. 
        2252. void
              ^
        2253. ngx_http_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
        2254. {

src/http/ngx_http_request.c:2324:38: Call
        2322.         c->write->handler = ngx_http_request_handler;
        2323. 
        2324.         ngx_http_finalize_request(r, ngx_http_special_response_handler(r, rc));
                                                   ^
        2325.         return;
        2326.     }

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:2593:1: Parameter `r->uri.len`
              2591. 
              2592. 
              2593. ngx_int_t
                    ^
              2594. ngx_http_internal_redirect(ngx_http_request_t *r,
              2595.     ngx_str_t *uri, ngx_str_t *args)

src/http/ngx_http_core_module.c:2623:5: Call
              2621.                    "internal redirect: \"%V?%V\"", uri, &r->args);
              2622. 
              2623.     ngx_http_set_exten(r);
                        ^
              2624. 
              2625.     /* clear the modules contexts */

src/http/ngx_http_core_module.c:1794:1: <LHS trace>
1792. 
1793. 
1794. void
      ^
1795. ngx_http_set_exten(ngx_http_request_t *r)
1796. {

src/http/ngx_http_core_module.c:1794:1: Parameter `r->uri.len`
                1792. 
                1793. 
                1794. void
                      ^
                1795. ngx_http_set_exten(ngx_http_request_t *r)
                1796. {

src/http/ngx_http_core_module.c:1801:10: Binary operation: ([0, +oo] - 1):unsigned64 by call to `ngx_http_upstream_connect` 
                1799.     ngx_str_null(&r->exten);
                1800. 
                1801.     for (i = r->uri.len - 1; i > 1; i--) {
                               ^
                1802.         if (r->uri.data[i] == '.' && r->uri.data[i - 1] != '/') {
                1803. 
