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-rw-r--r--src/Data/Array/Nested/Internal.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/Data/Array/Nested/Internal.hs b/src/Data/Array/Nested/Internal.hs
index 1999bb6..7d3b4bc 100644
--- a/src/Data/Array/Nested/Internal.hs
+++ b/src/Data/Array/Nested/Internal.hs
@@ -1080,7 +1080,7 @@ type ListS :: [Nat] -> Type -> Type
data ListS sh i where
ZS :: ListS '[] i
(::$) :: forall n sh {i}. (KnownNat n, KnownShape sh)
- => i -> ListS sh i -> ListS (n : sh) i
+ => !i -> !(ListS sh i) -> ListS (n : sh) i
deriving instance Show i => Show (ListS sh i)
deriving instance Eq i => Eq (ListS sh i)
deriving instance Ord i => Ord (ListS sh i)