Remove use of isVanillaDataCon, which was wrong under the new FC dispensation

diff --git a/compiler/specialise/SpecConstr.lhs b/compiler/specialise/SpecConstr.lhs
index 78d1731..8bba247 100644 (file)
--- a/compiler/specialise/SpecConstr.lhs
+++ b/compiler/specialise/SpecConstr.lhs
@@ -583,10 +583,7 @@ conArgOccs :: ArgOcc -> AltCon -> [ArgOcc]
 
 conArgOccs (ScrutOcc fm) (DataAlt dc) 
   | Just pat_arg_occs <- lookupUFM fm dc
-  = tyvar_unks ++ pat_arg_occs
-  where
-    tyvar_unks | isVanillaDataCon dc = [UnkOcc | tv <- dataConUnivTyVars dc]
-              | otherwise           = []
+  = [UnkOcc | tv <- dataConUnivTyVars dc] ++ pat_arg_occs
 
 conArgOccs other con = repeat UnkOcc
 \end{code}