Hi! I propose to add die :: String -> IO () die err = hPutStrLn stderr err >> exitFailure to System.Exit. Reasoning: (1) It's a frequently required functionality. Almost every command-line program has code similar to this. (2) The definition is relatively short, but in addition to the definition, you need two import statements. (3) It's frequently done wrong (e.g. writing to stdout instead of stderr, or not using exitFailure, or both). I haven't done any extensive research on Hackage, but I quickly looked at Haddock. Here we have a definition of die [1], but we also print to stdout at a couple of place and then call exitFailure [2]. Personally, I think it should be re-exported from Prelude. But this may be controversial. So let's have two separate votes: Add System.Exit.die: +1 Re-export it from Prelude: +1 (discussion until December, 28th) Cheers, Simon [1] https://github.com/ghc/haddock/blob/8d4c94ca5a969a5ebbb791939fb0195dc672429e... [2] https://github.com/ghc/haddock/blob/c6faeae064668125721b0d5e60f067f90c538933...