src/Distribution/PackageDescription/Utils.hs

    -----------------------------------------------------------------------------
    -- |
    -- Module      :  Distribution.PackageDescription.Utils
    --
    -- Maintainer  :  cabal-devel@haskell.org
    -- Portability :  portable
    --
    -- Common utils used by modules under Distribution.PackageDescription.*.

    module Distribution.PackageDescription.Utils (
      cabalBug, userBug
      ) where

    -- ----------------------------------------------------------------------------
    -- Exception and logging utils

    userBug :: String -> a
    userBug msg = error $ msg ++ ". This is a bug in your .cabal file."

    cabalBug :: String -> a
    cabalBug msg = error $ msg ++ ". This is possibly a bug in Cabal.\n"
                   ++ "Please report it to the developers: "
                   ++ "https://github.com/haskell/cabal/issues/new"