From c4fdeb3d53ac229de13c795c083006fc92025c9e Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Thu, 5 Sep 2013 14:55:11 -0700
Subject: no need to dup

---
 activerecord/lib/active_record/fixtures.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/activerecord/lib/active_record/fixtures.rb b/activerecord/lib/active_record/fixtures.rb
index c4decfbf73..c8de310b9c 100644
--- a/activerecord/lib/active_record/fixtures.rb
+++ b/activerecord/lib/active_record/fixtures.rb
@@ -438,7 +438,7 @@ module ActiveRecord
 
     class ClassCache
       def initialize(class_names, config)
-        @class_names = class_names.dup.stringify_keys
+        @class_names = class_names.stringify_keys
         @config      = config
       end
 
-- 
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