i think this is a feature not a bug

2017-02-16 16:01 GMT+08:00 洪志道 <hongzhi...@gmail.com>:

> Sorry, sent too much.
>
> 2017-02-16 16:00 GMT+08:00 洪志道 <hongzhi...@gmail.com>:
>
>> Hi!
>>
>> diff -r da46bfc484ef src/http/ngx_http_variables.c
>> --- a/src/http/ngx_http_variables.c Mon Feb 13 21:45:01 2017 +0300
>> +++ b/src/http/ngx_http_variables.c Wed Feb 08 10:31:53 2017 +0800
>> @@ -783,6 +783,10 @@
>>      ssize_t    s, *sp;
>>      ngx_str_t  val;
>>
>> +    if (v->data == NULL) {
>> +        return;
>> +    }
>> +
>>      val.len = v->len;
>>      val.data = v->data;
>>
>>
>> The following will cause core file, I think it's better to deal with in
>> nginx.
>>
>> server {
>>     listen  8000;
>>
>>     location / {
>>         content_by_lua_block {
>>             ngx.var.limit_rate = size;  # size is undefined.
>>             ngx.say('hello lua');
>>         }
>>     }
>>
>>
>> ============== set handler in lua-module ============
>>          if (value_type == LUA_TNIL) {
>>                 vv->valid = 0;
>>                 vv->not_found = 1;
>>                 vv->no_cacheable = 0;
>>                 vv->data = NULL;
>>                 vv->len = 0;
>>
>>             } else {
>>                 vv->valid = 1;
>>                 vv->not_found = 0;
>>                 vv->no_cacheable = 0;
>>
>>                 vv->data = val;
>>                 vv->len = len;
>>             }
>>
>>             v->set_handler(r, vv, v->data);
>> ===============================================
>>
>> Thanks.
>> B.R.
>>
>
>
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