Using emptypb in .proto results in reflection issue with tinygo

[amlwwalker]

I am trying to compile my plugin with tinygo.

tinygo version                                                                                                                                                                                                                                                                                    tinygo version 0.37.0 darwin/arm64 (using go version go1.24.3 and LLVM version 19.1.2)

go version
go version go1.24.3 darwin/arm64

compiling with

protoc --go-plugin_out=./pkg/pb --go-plugin_opt=paths=source_relative --proto_path=./pkg/proto ./pkg/proto/jetclock.proto

Compiling plugin with

tinygo build -o ./plugins/helloworld.wasm -scheduler=none -target=wasi --no-debug ./cmd/plugins/helloworld/helloworld.go

I get

tinygo build -o ./plugins/helloworld.wasm -scheduler=none -target=wasi --no-debug ./cmd/plugins/helloworld/helloworld.go
# google.golang.org/protobuf/internal/filetype
../../../../pkg/mod/google.golang.org/protobuf@v1.36.6/internal/filetype/build.go:230:21: undefined: reflect.SliceOf

In my .proto I have

import "google/protobuf/empty.proto";
...
service HostFunctions {
  rpc HttpGet(HttpGetRequest) returns (HttpResponse);
  rpc Log(LogRequest) returns (google.protobuf.Empty);
  rpc EmitPluginEvent(PluginEvent) returns (google.protobuf.Empty);
}

My understanding from the known example is that the protoc compiler will use the correct libraries to handle this

but i see in my .pb.go file thats generated

import (
	context "context"
	emptypb "github.com/knqyf263/go-plugin/types/known/emptypb"
	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
)

so this seems like its still using reflection from Google which I understand this should avoid?
Any tips so that I can compile with tinygo?
Thanks

[inliquid]

This is bug of newer versions of Tinygo. Try tinygo-v0.34.0 (and go1.23).