版本需要更新

Question

// This is a compile-time assertion to ensure that this generated file
// is compatible with the proto package it is being compiled against.
// A compilation error at this line likely means your copy of the
// proto package needs to be updated.
const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package

I can't start my app on MacOS. The version of protoc I've been using: 3.6.1. It fails and says:

undefined: proto.ProtoPackageIsVersion3 

in every self-generated *.pb.go file.

What can I do?

Answer 1

The comment is a bit unclear,

You should update https://github.com/golang/protobuf, but the tricky part here is that release v1.2.0 doesn't contain new changes for v3.6.1. You can use master branch in this case.