src/http/ngx_http_header_filter_module.c:485: error: Buffer Overrun L3
  Offset added: [1, 22] Size: [0, +oo].

src/http/ngx_http_header_filter_module.c:281:5: <Offset trace>
279. 
280. #if (NGX_SUPPRESS_WARN)
281.     ngx_str_null(&tokens);
         ^
282. #endif
283. 

src/http/ngx_http_header_filter_module.c:281:5: Assignment
279. 
280. #if (NGX_SUPPRESS_WARN)
281.     ngx_str_null(&tokens);
         ^
282. #endif
283. 

src/http/ngx_http_header_filter_module.c:281:5: <Length trace>
279. 
280. #if (NGX_SUPPRESS_WARN)
281.     ngx_str_null(&tokens);
         ^
282. #endif
283. 

src/http/ngx_http_header_filter_module.c:281:5: Assignment
279. 
280. #if (NGX_SUPPRESS_WARN)
281.     ngx_str_null(&tokens);
         ^
282. #endif
283. 

src/http/ngx_http_header_filter_module.c:485:19: Array access: Offset added: [1, 22] Size: [0, +oo]
483. 
484.     if (r->headers_out.server == NULL && tokens.len) {
485.         b->last = ngx_cpymem(b->last, tokens.data, tokens.len);
                       ^
486.     }
487. 
