wenbinye opened a new issue #2758:
URL: https://github.com/apache/apisix/issues/2758
### Issue description
Cannot add stream_proxy config
### Environment
* apisix version (cmd: `apisix version`): 2.0
* OS: CentOS 8
### Minimal test code / Steps to reproduce the issue
1. add in conf/config.yaml
```yaml
apisix:
stream_proxy:
tcp: [ 6370 ]
```
2. run `apisix init`，errors displayed：
```
lua: ./bin/apisix:613: attempt to index a nil value (local 'base')
stack traceback:
./bin/apisix:613: in upvalue 'merge_conf'
./bin/apisix:615: in upvalue 'merge_conf'
./bin/apisix:615: in upvalue 'merge_conf'
./bin/apisix:659: in upvalue 'read_yaml_conf'
./bin/apisix:825: in field '?'
./bin/apisix:1165: in main chunk
[C]: in ?
```
### What's the actual result? (including assertion message & call stack if
applicable)
nginx.conf was not generate.
if change conf/config-default.yaml add same config, `apisix init` will run
successfully：
```yaml
apisix:
stream_proxy:
tcp: [ 6370 ]
```
### What's the expected result?
----------------------------------------------------------------
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