That syntax basically means "I am deliberately not handling error returns". I always pair it with a comment that explains why I can do that. It comes up. A common one for me for instance is using .Write([]byte) (int, error) on a bytes.Buffer. Because that .Write implements an interface that has an error return, there's an error return, but a byte buffer can never fail to .Write. (If it does due to memory running out, I don't think it ever comes back as an error, just the process terminating.)

There's no point being more particular about it... there's no practical way to force a programmer to handle an error, especially in light of the fact that "do nothing with the error" is also a perfectly acceptable thing to do! (Example: Writing a JSON document out as the result of an HTTP API call. I don't want to log every such error, because that just crufts up my logs, I don't need metrics on this particular system, and once the HTTP stream is broken there's nowhere left to write an error out to the user, so... discard it is.)

Ah, that makes sense. I wonder if a compiler flag would be a good compromise? As a way to report unhandled errors, but still let it compile.