Index: clang/lib/Sema/SemaDecl.cpp
===================================================================
--- clang/lib/Sema/SemaDecl.cpp
+++ clang/lib/Sema/SemaDecl.cpp
@@ -1906,7 +1906,8 @@
   // entirely, but we're not there yet.
   DeclContext *SavedContext = CurContext;
   CurContext = Parent;
-  PushOnScopeChains(New, TUScope);
+  if (TUScope)
+    PushOnScopeChains(New, TUScope);
   CurContext = SavedContext;
   return New;
 }