X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2FcoreSyn%2FMkExternalCore.lhs;h=246bfa05c74768b963286fc7166798b27c82b985;hb=27ca67931713c36f5ed248de88298416892e5649;hp=e7d79e616270742fb5cec8881557b1defd3bf39a;hpb=0b86bc9b022a5965d2b35f143ff4b919f784e676;p=ghc-hetmet.git

diff --git a/compiler/coreSyn/MkExternalCore.lhs b/compiler/coreSyn/MkExternalCore.lhs
index e7d79e6..246bfa0 100644
--- a/compiler/coreSyn/MkExternalCore.lhs
+++ b/compiler/coreSyn/MkExternalCore.lhs
@@ -69,7 +69,7 @@ collect_tdefs tcon tdefs
 --         | null (tyConDataCons tcon) = error "MkExternalCore died: can't handle datatype declarations with no data constructors"
          | otherwise = 
                 C.Data (make_con_qid (tyConName tcon)) (map make_tbind tyvars) (map make_cdef (tyConDataCons tcon)) 
-         where repclause | isRecursiveTyCon tcon = Nothing
+         where repclause | isRecursiveTyCon tcon || isOpenTyCon tcon= Nothing
 		         | otherwise = Just (make_ty rep)
                                            where (_, rep) = newTyConRep tcon
     tyvars = tyConTyVars tcon