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nrolland/hangsGHC.hs

Created June 6, 2016 14:32
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hangsGHC.hs
#!/usr/bin/env stack
-- stack --install-ghc --resolver lts-6.1 runghc --package http-conduit
{-# LANGUAGE TypeFamilies, UndecidableInstances #-}
module HangGhc where
type family List a :: *
type instance List a = Either () (a, List a)
-- Hangs ghc 6.12.1:
nil :: List a
nil = Left ()
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