Don’t lookupOverrides of special names.

Author: David Ungar

lib/AST/UnqualifiedLookup.cpp

@@ -504,7 +504,7 @@ void UnqualifiedLookupFactory::performUnqualifiedLookup() {
 void UnqualifiedLookupFactory::lookUpTopLevelNamesInModuleScopeContext(
     DeclContext *DC) {
   // TODO: Does the debugger client care about compound names?
-  if (Name.isSimpleName() && DebugClient &&
+  if (Name.isSimpleName() && !Name.isSpecial() && DebugClient &&
       DebugClient->lookupOverrides(Name.getBaseName(), DC, Loc,
                                    isOriginallyTypeLookup, Results))
     return;