src/http/modules/ngx_http_proxy_module.c:2606: error: Integer Overflow L2
  ([0, +oo] - 7):unsigned64.

src/http/modules/ngx_http_proxy_module.c:2551:9: <LHS trace>
2549.     url = &value[1];
2550. 
2551.     n = ngx_http_script_variables_count(url);
              ^
2552. 
2553.     if (n) {

src/http/modules/ngx_http_proxy_module.c:2551:9: Call
2549.     url = &value[1];
2550. 
2551.     n = ngx_http_script_variables_count(url);
              ^
2552. 
2553.     if (n) {

src/http/ngx_http_script.c:214:1: Parameter `value->len`
  212. 
  213. 
  214. ngx_uint_t
       ^
  215. ngx_http_script_variables_count(ngx_str_t *value)
  216. {

src/http/modules/ngx_http_proxy_module.c:2581:9: <RHS trace>
2579. 
2580.     if (ngx_strncasecmp(url->data, (u_char *) "http://", 7) == 0) {
2581.         add = 7;
              ^
2582.         port = 80;
2583. 

src/http/modules/ngx_http_proxy_module.c:2581:9: Assignment
2579. 
2580.     if (ngx_strncasecmp(url->data, (u_char *) "http://", 7) == 0) {
2581.         add = 7;
              ^
2582.         port = 80;
2583. 

src/http/modules/ngx_http_proxy_module.c:2606:5: Binary operation: ([0, +oo] - 7):unsigned64
2604.     ngx_memzero(&u, sizeof(ngx_url_t));
2605. 
2606.     u.url.len = url->len - add;
          ^
2607.     u.url.data = url->data + add;
2608.     u.default_port = port;
