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{-# LANGUAGE ScopedTypeVariables #-}
{-# OPTIONS_GHC -Wmonomorphism-restriction #-}
module Bug where
class Monad m => C m where
c :: (m Char, m Char)
foo :: forall m. C m => m Char
foo = bar >> baz >> bar2
where
-- Should not get MR warning
bar, baz :: m Char
(bar, baz) = c
-- Should get MR warning
(bar2, baz2) = c
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