src/http/modules/ngx_http_map_module.c:217: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64.

src/http/modules/ngx_http_map_module.c:207:5: <LHS trace>
205. 
206.     name = value[1];
207.     name.len--;
         ^
208.     name.data++;
209. 

src/http/modules/ngx_http_map_module.c:207:5: Assignment
205. 
206.     name = value[1];
207.     name.len--;
         ^
208.     name.data++;
209. 

src/http/modules/ngx_http_map_module.c:210:18: Call
208.     name.data++;
209. 
210.     map->index = ngx_http_get_variable_index(cf, &name);
                      ^
211. 
212.     if (map->index == NGX_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_map_module.c:217:5: Binary operation: ([0, +oo] - 1):unsigned64
215. 
216.     name = value[2];
217.     name.len--;
         ^
218.     name.data++;
219. 
