dev-null-undefined

https://freenginx.org/hg/nginx/rev/ebebc1d68046

I believe there is a bug in the code where when you send a local response which overrides the action, and trap after it nginx will then segfault when trying...

Since the ngx_proxy_wasm_instance_t is not yet created and set to the instance->data, every host calls that uses the data field through the `ngx_proxy_wasm_instance2pwexec` function will cause segmentation fault. https://github.com/Kong/ngx_wasm_module/blob/main/src/wasm/vm/ngx_wavm.c#L1065