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-- Gave a bad error message in a version of 6.3, as a
-- result of 6.3's new duplicate-instance reporting structure
--
-- Foo.hs:4:5:
-- No instance for `Eq Foo'
-- When deriving the `Eq' instance for type `Bar'
module ShouldFail where
data Bar = Bar Foo deriving Eq
data Foo = Foo deriving Eq
instance Eq Foo where
Foo == Foo = True
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