https://github.com/protobuf-c/protobuf-c/commit/7456d1621223d425b8a3fd74e435a79c046169fb

--- /t/generated-code2/cxx-generate-packed-data.cc
+++ /t/generated-code2/cxx-generate-packed-data.cc
@@ -998,7 +998,7 @@
 static void dump_test_unknown_fields (void)
 {
   EmptyMess mess;
-  const google::protobuf::Message::Reflection *reflection = mess.GetReflection();
+  const google::protobuf::Reflection *reflection = mess.GetReflection();
   google::protobuf::UnknownFieldSet *fs = reflection->MutableUnknownFields(&mess);
 
 #if GOOGLE_PROTOBUF_VERSION >= 2001000