yangxikun opened a new issue, #8810:
URL: https://github.com/apache/apisix/issues/8810
### Current Behavior
lua entry thread aborted, cause http 500 response.
### Expected Behavior
Should not abort.
### Error Logs
```
2023/02/06 16:20:21 [error] 52#52: *75286 lua entry thread aborted: runtime
error: /usr/local/apisix-2.13.2/apisix/core/utils.lua:298: attempt to index
upvalue '_ctx' (a nil value)
stack traceback:
coroutine 0:
/usr/local/apisix-2.13.2/apisix/core/utils.lua: in function 'replace'
/usr/local/openresty/lualib/resty/core/regex.lua:1003: in function
're_gsub'
/usr/local/apisix-2.13.2/apisix/core/utils.lua:319: in function
'resolve_var'
/usr/local/apisix-2.13.2/apisix/plugins/mocking.lua:221: in function
'phase_func'
/usr/local/apisix-2.13.2/apisix/plugin.lua:748: in function 'run_plugin'
/usr/local/apisix-2.13.2/apisix/init.lua:481: in function
'http_access_phase'
access_by_lua(nginx.conf:300):2: in main chunk
```
### Steps to Reproduce
config mocking like:
```yaml
routes:
-
uri: /hello
upstream:
nodes:
"127.0.0.1:1980": 1
type: roundrobin
plugins:
mocking:
response_example: '{"$a":1}'
```
### Environment
- APISIX version (run `apisix version`): master branch
- Operating system (run `uname -a`):
- OpenResty / Nginx version (run `openresty -V` or `nginx -V`):
- etcd version, if relevant (run `curl
http://127.0.0.1:9090/v1/server_info`):
- APISIX Dashboard version, if relevant:
- Plugin runner version, for issues related to plugin runners:
- LuaRocks version, for installation issues (run `luarocks --version`):
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