From be701f3e06ee1fec0399f4cead255f23a56a6458 Mon Sep 17 00:00:00 2001
From: Austin Matzko <austin@pressedcode.com>
Date: Wed, 3 Oct 2018 17:59:58 -0400
Subject: [PATCH] Don't attempt to dup a nil

---
 lib/fast_jsonapi/object_serializer.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/fast_jsonapi/object_serializer.rb b/lib/fast_jsonapi/object_serializer.rb
index 1895071..8d3ef03 100644
--- a/lib/fast_jsonapi/object_serializer.rb
+++ b/lib/fast_jsonapi/object_serializer.rb
@@ -117,7 +117,7 @@ module FastJsonapi
         subclass.transform_method = transform_method
         subclass.cache_length = cache_length
         subclass.race_condition_ttl = race_condition_ttl
-        subclass.data_links = data_links.dup
+        subclass.data_links = data_links.dup if data_links.present?
         subclass.cached = cached
         subclass.set_type(subclass.reflected_record_type) if subclass.reflected_record_type
         subclass.meta_to_serialize = meta_to_serialize