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{-# LANGUAGE TypeOperators, TypeFamilies, GADTs, EmptyCase #-}
module T10180 where
newtype Foo = Foo Int
type family Bar a
type instance Bar Int = Int
type family Baz a where
Baz Int = Int
Baz Char = Int
data a :~: b where
Refl :: a :~: a
absurd0 :: Int :~: Bool -> a
absurd0 x = case x of {}
absurd1 :: Foo :~: Bool -> a
absurd1 x = case x of {}
absurd2 :: Bar Int :~: Bool -> a
absurd2 x = case x of {}
absurd3 :: Baz a :~: Bool -> a
absurd3 x = case x of {}
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