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> Go compiler raise an error if a variable (error) goes unused
It doesn't though. It's perfectly valid to not use the return value of a function that only returns an error, for instance.
There are static error checking tools you can use like https://github.com/kisielk/errcheck to work around this, but most people don't use them.
I've run into a lack of Go error checking many times. Many times it's just the trivial case, where the compiler doesn't warn about not checking the result of an error-returning function.
But often it'll be subtler, and the result of Go's API design. One example is its file writing API, which requires you to close the file and check its error to be correct. Many times people will just `defer file.Close()`, but that isn't good enough - you're ignoring the error there.
Worse still is e.g: writing to a file through a bufio.Writer. To be correct, you need to remember to flush the writer, check that error, then close the file and check that error. There's no type-level support to make sure you do that.
> You can take a look at System.Diagnostics.Process for one of the worst offenders.
Yeah, this is one of my least favourite APIs in all of .NET. My understanding is that the .NET team is planning to redo it in the next few years, but if you want something better right now I highly recommend the excellent CliWrap library: https://github.com/Tyrrrz/CliWrap
