Fix Trac #2412: type synonyms and hs-boot recursion

[ghc-hetmet.git] / compiler / iface / MkIface.lhs

diff --git a/compiler/iface/MkIface.lhs b/compiler/iface/MkIface.lhs
index 3f1ee46..bc84cf1 100644 (file)
--- a/compiler/iface/MkIface.lhs
+++ b/compiler/iface/MkIface.lhs
@@ -1290,8 +1290,8 @@ tyThingToIfaceDecl (ATyCon tycon)
   | isSynTyCon tycon
   = IfaceSyn { ifName    = getOccName tycon,
                ifTyVars  = toIfaceTvBndrs tyvars,
-               ifOpenSyn = syn_isOpen,
-               ifSynRhs  = toIfaceType syn_tyki,
+               ifSynRhs  = syn_rhs,
+               ifSynKind = syn_ki,
                 ifFamInst = famInstToIface (tyConFamInst_maybe tycon)
              }
 
@@ -1312,9 +1312,10 @@ tyThingToIfaceDecl (ATyCon tycon)
   | otherwise = pprPanic "toIfaceDecl" (ppr tycon)
   where
     tyvars = tyConTyVars tycon
-    (syn_isOpen, syn_tyki) = case synTyConRhs tycon of
-                              OpenSynTyCon ki _ -> (True , ki)
-                              SynonymTyCon ty   -> (False, ty)
+    (syn_rhs, syn_ki) 
+       = case synTyConRhs tycon of
+           OpenSynTyCon ki _ -> (Nothing,               toIfaceType ki)
+           SynonymTyCon ty   -> (Just (toIfaceType ty), toIfaceType (typeKind ty))
 
     ifaceConDecls (NewTyCon { data_con = con })     = 
       IfNewTyCon  (ifaceConDecl con)