___         ___ _
  / _ \ /\  /\/ __(_)
 / /_\// /_/ / /  | |      GHC Interactive, version 4.11, For Haskell 98.
/ /_\\/ __  / /___| |      http://www.haskell.org/ghc/
\____/\/ /_/\____/|_|      Type :? for help.

Loading package std ... linking ... done.
Prelude> -- bug: we used to throw away the instance accidentally here
Prelude> :m PrelBase
PrelBase> 1 == (2 :: Int)
False
PrelBase> 1 == (2 :: Int)
False
PrelBase> Leaving GHCi.