[vsenko]

It would be great if you could elaborate on this: "Sending to an Unbuffered Channel Returns As Soon As the Target Receiver Is Ready"

As far as I understand, the problem is that the printing goroutine is forced to exit when the main goroutine exits. This way it's unknown if all the submitted work was done.

It seems to me that the caption is a bit misleading, it implies that the problem occurs only with "Unbuffered" channels.