src/http/modules/ngx_http_geo_module.c:235: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64.

src/http/modules/ngx_http_geo_module.c:224:5: <LHS trace>
222. 
223.     name = value[1];
224.     name.len--;
         ^
225.     name.data++;
226. 

src/http/modules/ngx_http_geo_module.c:224:5: Assignment
222. 
223.     name = value[1];
224.     name.len--;
         ^
225.     name.data++;
226. 

src/http/modules/ngx_http_geo_module.c:229:22: Call
227.     if (cf->args->nelts == 3) {
228. 
229.         geo->index = ngx_http_get_variable_index(cf, &name);
                          ^
230.         if (geo->index == NGX_ERROR) {
231.             return NGX_CONF_ERROR;

src/http/ngx_http_variables.c:322:1: Parameter `name->len`
  320. 
  321. 
  322. ngx_int_t
       ^
  323. ngx_http_get_variable_index(ngx_conf_t *cf, ngx_str_t *name)
  324. {

src/http/modules/ngx_http_geo_module.c:235:9: Binary operation: ([0, +oo] - 1):unsigned64
233. 
234.         name = value[2];
235.         name.len--;
             ^
236.         name.data++;
237. 
