Index: clang/lib/Parse/ParseDeclCXX.cpp
===================================================================
--- clang/lib/Parse/ParseDeclCXX.cpp
+++ clang/lib/Parse/ParseDeclCXX.cpp
@@ -1933,7 +1933,8 @@
                                TemplateParams ? TemplateParams->size() : 0));
   } else {
     if (TUK != Sema::TUK_Declaration && TUK != Sema::TUK_Definition)
-      ProhibitAttributes(attrs);
+      ProhibitCXX11Attributes(attrs, diag::err_attributes_not_allowed,
+                              /* DiagnoseEmptyAttrs=*/true);
 
     if (TUK == Sema::TUK_Definition &&
         TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) {