[project @ 1998-06-01 12:28:39 by sof]

Turn off pruning of newtypes, the code generator may need to see constructor

diff --git a/ghc/compiler/rename/RnIfaces.lhs b/ghc/compiler/rename/RnIfaces.lhs
index 8092a6d..b42efb0 100644 (file)
--- a/ghc/compiler/rename/RnIfaces.lhs
+++ b/ghc/compiler/rename/RnIfaces.lhs
@@ -618,6 +618,10 @@ getNonWiredDataDecl needed_name
                    ty_decl@(TyData new_or_data context tycon tyvars condecls derivings pragmas src_loc)
   |  needed_name == tycon_name
   && opt_PruneTyDecls
+        -- don't prune newtypes, as the code generator may
+       -- want to peer inside a newtype type constructor
+       -- (ClosureInfo.fun_result_ty is the culprit.)
+  && not (new_or_data == NewType)
   && not (nameUnique needed_name `elem` cCallishTyKeys)                
        -- Hack!  Don't prune these tycons whose constructors
        -- the desugarer must be able to see when desugaring