X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Ftypes%2FType.lhs;h=c9bf3f5d65a8af33e75053314fb75c4161d4a615;hp=5f348efd35ab6626c8b2133988af15c80da1c3d4;hb=ce2ea8274f72199ac32d5219fcadb0aaeb968707;hpb=8419203b7eb5aa4bb13f8d1263632de4d10a4048

diff --git a/compiler/types/Type.lhs b/compiler/types/Type.lhs
index 5f348ef..c9bf3f5 100644
--- a/compiler/types/Type.lhs
+++ b/compiler/types/Type.lhs
@@ -949,9 +949,9 @@ isAlgType ty
 isClosedAlgType :: Type -> Bool
 isClosedAlgType ty
   = case splitTyConApp_maybe ty of
-      Just (tc, ty_args) -> ASSERT( ty_args `lengthIs` tyConArity tc )
-			    isAlgTyCon tc && not (isFamilyTyCon tc)
-      _other	         -> False
+      Just (tc, ty_args) | isAlgTyCon tc && not (isFamilyTyCon tc)
+             -> ASSERT2( ty_args `lengthIs` tyConArity tc, ppr ty ) True
+      _other -> False
 \end{code}
 
 \begin{code}