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-rw-r--r--src/Data/Array/Nested/Permutation.hs1
1 files changed, 0 insertions, 1 deletions
diff --git a/src/Data/Array/Nested/Permutation.hs b/src/Data/Array/Nested/Permutation.hs
index 03d1640..1eb7be1 100644
--- a/src/Data/Array/Nested/Permutation.hs
+++ b/src/Data/Array/Nested/Permutation.hs
@@ -276,7 +276,6 @@ lemRankDropLen :: forall is sh. (Rank is <= Rank sh)
lemRankDropLen ZKX PNil = Refl
lemRankDropLen (_ :!% sh) (_ `PCons` is) | Refl <- lemRankDropLen sh is = Refl
lemRankDropLen (_ :!% _) PNil = Refl
-lemRankDropLen ZKX (_ `PCons` _) = error "1 <= 0"
lemIndexSucc :: Proxy i -> Proxy a -> Proxy l
-> Index (i + 1) (a : l) :~: Index i l