That's a terrible example and I hate go for that. It makes writing code iteratively huge PITA. It's error to turn warnings into error. My final code is free of

That's a terrible example and I hate go for that. It makes writing code iteratively huge PITA. It's error to turn warnings into error. My final code is free of warnings, however having a warning during development, especially so innocent like unused variable should totally be fine. Because I just wrote this code and I need to test that something works and then I'll write the next part.