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-rw-r--r--src/Data/Array/Mixed/Permutation.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/Data/Array/Mixed/Permutation.hs b/src/Data/Array/Mixed/Permutation.hs
index 8efcbe8..cedfa22 100644
--- a/src/Data/Array/Mixed/Permutation.hs
+++ b/src/Data/Array/Mixed/Permutation.hs
@@ -85,7 +85,7 @@ permCheckPermutation = \p k ->
provePerm1 :: Proxy isTop -> SNat (Rank isTop) -> Perm is'
-> Maybe (AllElem' is' (Count 0 (Rank isTop)) :~: True)
- provePerm1 _ _ PNil = Just (Refl)
+ provePerm1 _ _ PNil = Just Refl
provePerm1 p rtop@SNat (PCons sn@SNat perm)
| Just Refl <- provePerm1 p rtop perm
= case (cmpNat (SNat @0) sn, cmpNat sn rtop) of