src/http/modules/ngx_http_geo_module.c:352: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64.

src/http/modules/ngx_http_geo_module.c:334:5: <LHS trace>
332.     }
333. 
334.     name.len--;
         ^
335.     name.data++;
336. 

src/http/modules/ngx_http_geo_module.c:334:5: Assignment
332.     }
333. 
334.     name.len--;
         ^
335.     name.data++;
336. 

src/http/modules/ngx_http_geo_module.c:339:22: Call
337.     if (cf->args->nelts == 3) {
338. 
339.         geo->index = ngx_http_get_variable_index(cf, &name);
                          ^
340.         if (geo->index == NGX_ERROR) {
341.             return NGX_CONF_ERROR;

src/http/ngx_http_variables.c:395:1: Parameter `name->len`
  393. 
  394. 
  395. ngx_int_t
       ^
  396. ngx_http_get_variable_index(ngx_conf_t *cf, ngx_str_t *name)
  397. {

src/http/modules/ngx_http_geo_module.c:352:9: Binary operation: ([0, +oo] - 1):unsigned64
350.         }
351. 
352.         name.len--;
             ^
353.         name.data++;
354. 
