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export hGetBufSome (#4046)
[ghc-base.git]
/
Data
/
Traversable.hs
diff --git
a/Data/Traversable.hs
b/Data/Traversable.hs
index
969e720
..
30aaee6
100644
(file)
--- a/
Data/Traversable.hs
+++ b/
Data/Traversable.hs
@@
-103,7
+103,7
@@
class (Functor t, Foldable t) => Traversable t where
-- instances for Prelude types
instance Traversable Maybe where
- traverse f Nothing = pure Nothing
+ traverse _ Nothing = pure Nothing
traverse f (Just x) = Just <$> f x
instance Traversable [] where