[GitHub] [apisix] hauer9 opened a new issue #3171: runtime error（ctx.lua）: bad argument #2 to 'setmetatable' (nil or table expected)

[GitBox]

hauer9 opened a new issue #3171:
URL: https://github.com/apache/apisix/issues/3171


   ### Issue description
   
   I had the same error as issue #3079 while debugging my program, and then I 
fixed the bug with pr #3105, but this error happened.
   
   
![image](https://user-images.githubusercontent.com/38620097/103406321-45e86300-4b95-11eb-9490-c8eb5ca06a55.png)
   
![image](https://user-images.githubusercontent.com/38620097/103406336-51d42500-4b95-11eb-8c07-5493913ce9bd.png)
   
   
![image](https://user-images.githubusercontent.com/38620097/103406295-310bcf80-4b95-11eb-9e82-1ae769721914.png)
   
   
   ### Environment
   
   * apisix version: 2.1
   * OS: Linux
   * Nginx version: openresty / 1.19.3.1
   


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