Plugin client won't bootstrap successfully if the first message sent from plugin is not the negotiation format.

I'm now using go-plugin to develop some Golang applications and it works well. Except that if the first message the client received from the plugin is not the right format like: 1|1|tcp|127.0.0.1:1234|grpc, the client will not correctly negotiate with the plugin process . This is a bit strict if some plugin written in Golang import other third party libs that print something in the init function.
may be we could add some regex filter to extract the negotiate message from the plugin output? Or do we have better solution to deal with this problem?