Gogland EAP 12 type compatibility error

main.go

package main

import (
	"log"
	"os"
	"fmt"

	"cloud.google.com/go/pubsub"
	"golang.org/x/net/context"
)

func main() {
	os.Setenv("PUBSUB_EMULATOR_HOST", "localhost:8085")
	ctx := context.Background()
	ps, err := pubsub.NewClient(ctx, "alice-dev-160410")
	if err != nil {
		log.Fatal(err)
	}
	topic := ps.Topic("fnord")
	message := pubsub.Message{Data: []byte("ping")}
	sub := ps.Subscription("fnord-sub")
	topic.Publish(ctx, &message)

	cctx, cancel := context.WithCancel(ctx)
	sub.Receive(cctx, func(cctx context.Context, msg *pubsub.Message) {
		fmt.Println(msg.Data)
		cancel()
	})
}