src/http/ngx_http_upstream.c:938: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64 by call to `ngx_http_upstream_connect`.

src/http/ngx_http_upstream.c:938:5: Call
936.     ur->ctx = NULL;
937. 
938.     ngx_http_upstream_connect(r, u);
         ^
939. 
940. failed:

src/http/ngx_http_upstream.c:1132:1: Parameter `r->uri.len`
  1130. 
  1131. 
  1132. static void
        ^
  1133. ngx_http_upstream_connect(ngx_http_request_t *r, ngx_http_upstream_t *u)
  1134. {

src/http/ngx_http_upstream.c:1175:9: Call
  1173.     if (rc == NGX_BUSY) {
  1174.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "no live upstreams");
  1175.         ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_NOLIVE);
                ^
  1176.         return;
  1177.     }

src/http/ngx_http_upstream.c:3158:1: Parameter `r->uri.len`
    3156. 
    3157. 
    3158. static void
          ^
    3159. ngx_http_upstream_next(ngx_http_request_t *r, ngx_http_upstream_t *u,
    3160.     ngx_uint_t ft_type)

src/http/ngx_http_upstream.c:3248:17: Call
    3246.                 }
    3247. 
    3248.                 ngx_http_upstream_finalize_request(r, u, rc);
                          ^
    3249.                 return;
    3250.             }

src/http/ngx_http_upstream.c:3296:1: Parameter `r->uri.len`
      3294. 
      3295. 
      3296. static void
            ^
      3297. ngx_http_upstream_finalize_request(ngx_http_request_t *r,
      3298.     ngx_http_upstream_t *u, ngx_int_t rc)

src/http/ngx_http_upstream.c:3425:9: Call
      3423. 
      3424.     if (r->header_only) {
      3425.         ngx_http_finalize_request(r, rc);
                    ^
      3426.         return;
      3427.     }

src/http/ngx_http_request.c:2198:1: Parameter `r->uri.len`
        2196. 
        2197. 
        2198. void
              ^
        2199. ngx_http_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
        2200. {

src/http/ngx_http_request.c:2270:38: Call
        2268.         c->write->handler = ngx_http_request_handler;
        2269. 
        2270.         ngx_http_finalize_request(r, ngx_http_special_response_handler(r, rc));
                                                   ^
        2271.         return;
        2272.     }

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:2551:1: Parameter `r->uri.len`
              2549. 
              2550. 
              2551. ngx_int_t
                    ^
              2552. ngx_http_internal_redirect(ngx_http_request_t *r,
              2553.     ngx_str_t *uri, ngx_str_t *args)

src/http/ngx_http_core_module.c:2581:5: Call
              2579.                    "internal redirect: \"%V?%V\"", uri, &r->args);
              2580. 
              2581.     ngx_http_set_exten(r);
                        ^
              2582. 
              2583.     /* clear the modules contexts */

src/http/ngx_http_core_module.c:1795:1: <LHS trace>
1793. 
1794. 
1795. void
      ^
1796. ngx_http_set_exten(ngx_http_request_t *r)
1797. {

src/http/ngx_http_core_module.c:1795:1: Parameter `r->uri.len`
                1793. 
                1794. 
                1795. void
                      ^
                1796. ngx_http_set_exten(ngx_http_request_t *r)
                1797. {

src/http/ngx_http_core_module.c:1802:10: Binary operation: ([0, +oo] - 1):unsigned64 by call to `ngx_http_upstream_connect` 
                1800.     ngx_str_null(&r->exten);
                1801. 
                1802.     for (i = r->uri.len - 1; i > 1; i--) {
                               ^
                1803.         if (r->uri.data[i] == '.' && r->uri.data[i - 1] != '/') {
                1804. 
