Fix Trac #3792: check for qualified names in import items

diff --git a/compiler/rename/RnNames.lhs b/compiler/rename/RnNames.lhs
index 7ccc7a2..7d367c7 100644 (file)
--- a/compiler/rename/RnNames.lhs
+++ b/compiler/rename/RnNames.lhs
@@ -580,10 +580,10 @@ filterImports iface decl_spec (Just (want_hiding, import_items)) all_avails
     lookup_ie opt_typeFamilies ie 
       = let bad_ie = Failed (badImportItemErr iface decl_spec ie)
 
     lookup_ie opt_typeFamilies ie 
       = let bad_ie = Failed (badImportItemErr iface decl_spec ie)
 

-            lookup_name rdrName = 
-                case lookupOccEnv occ_env (rdrNameOcc rdrName) of
-                   Nothing -> bad_ie
-                   Just n  -> return n
+            lookup_name rdr 
+             | isQual rdr = Failed (qualImportItemErr rdr)
+              | Just nm <- lookupOccEnv occ_env (rdrNameOcc rdr) = return nm
+              | otherwise                                        = bad_ie

         in
         case ie of
          IEVar n -> do
         in
         case ie of
          IEVar n -> do

@@ -1386,6 +1386,11 @@ printMinimalImports imports_w_usage
 %************************************************************************
 
 \begin{code}
 %************************************************************************
 
 \begin{code}

+qualImportItemErr :: RdrName -> SDoc
+qualImportItemErr rdr
+  = hang (ptext (sLit "Illegal qualified name in import item:"))
+       2 (ppr rdr)
+

 badImportItemErr :: ModIface -> ImpDeclSpec -> IE RdrName -> SDoc
 badImportItemErr iface decl_spec ie
   = sep [ptext (sLit "Module"), quotes (ppr (is_mod decl_spec)), source_import,
 badImportItemErr :: ModIface -> ImpDeclSpec -> IE RdrName -> SDoc
 badImportItemErr iface decl_spec ie
   = sep [ptext (sLit "Module"), quotes (ppr (is_mod decl_spec)), source_import,