> since Go has support for neither immutable structures not unique pointers, the objects passed through the channel can be mutable and keep being used by the sender. Go will not help you avoid this.

Channels are pass-by-value. If you pass a struct, it's copied, and both sides can mutate their own copies as much as they want.

You can get still bugs if you make channels of pointers (or have pointers in your message structs etc).