Security

The generated function Register<Service>Server now panics if the Unimplemented<Service>Server struct is embedded in a way that would otherwise lead to runtime panics if an unimplemented method was called. Users are advised to ensure they are properly embedding the Unimplemented struct for their service, and to regenerate their proto files to confirm. (#7438)
- Note: "Proper embedding" of the Unimplemented struct means either embedding the struct by value (preferred) or ensuring it is always initialized to a valid pointer. E.g.

struct MyServiceImpl {
	pb.UnimplementedMyServiceServer // embedded by value, not pointer
	// .. other struct fields ..
}

New Features

Generated code for services will produce streaming method definitions using one of six different generic types (e.g. BidiStreamingServer or ClientStreamingClient) instead of producing complete interfaces and implementations for the streaming methods. This can be disabled by setting use_generic_streams_experimental=false. Please file a bug if you encounter any issues with this behavior. (#7387)

A period (.) is added to the end of the service interface doc comment to comply with Godoc. (#7392)