RPC Error on Crossplane Composition Function using KCL

[Peefy]

Hi Community, I've built a Crossplane Composition Function using KCL https://github.com/kcl-lang/crossplane-kcl and the composition function go template https://github.com/crossplane/function-template-go

Related issue: kcl-lang/kcl#885

However, I've met a RPC error when debug the function. (My crossplane CLI version is v1.14.4). The steps are

1. Start the function locally in the code repo

# Run the function locally
go run . --insecure --debug

2. Then, in another terminal, call it with these example manifests

cd ./examples/resources/basic && crossplane beta render xr.yaml composition.yaml functions.yaml -r

At last, I've got the error message

crossplane: error: cannot render composite resource: cannot run pipeline step "normal": rpc error: code = Unavailable desc = error reading from server: EOF

Can someone help me?

[Peefy]

I see. I've forgot to add annotations for the local function. Thank you!

apiVersion: pkg.crossplane.io/v1beta1
kind: Function
metadata:
  name: kcl-function
  annotations:
    # This tells crossplane beta render to connect to the function locally.
    render.crossplane.io/runtime: Development
spec:
  package: kcllang/crossplane-kcl