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OTypeMirror should be declared with OverlappingInstances on.

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1 parent da66deb commit 24b742a138d46409d9d07bf5358803f9fea52705 @colah committed Dec 4, 2012
Showing with 1 addition and 1 deletion.
  1. +1 −1 Graphics/Implicit/ExtOpenScad/Util/OVal.hs
@@ -1,5 +1,5 @@
-{-# LANGUAGE ViewPatterns, RankNTypes, ScopedTypeVariables, TypeSynonymInstances, FlexibleInstances #-}
+{-# LANGUAGE ViewPatterns, RankNTypes, ScopedTypeVariables, TypeSynonymInstances, FlexibleInstances, OverlappingInstances #-}
module Graphics.Implicit.ExtOpenScad.Util.OVal where

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