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-rw-r--r--actionpack/lib/action_dispatch/http/filter_parameters.rb1
-rwxr-xr-xactiverecord/lib/active_record/base.rb1
-rw-r--r--activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb2
-rw-r--r--activeresource/lib/active_resource/base.rb1
4 files changed, 5 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/http/filter_parameters.rb b/actionpack/lib/action_dispatch/http/filter_parameters.rb
index e42b4d09b0..152aaa2e67 100644
--- a/actionpack/lib/action_dispatch/http/filter_parameters.rb
+++ b/actionpack/lib/action_dispatch/http/filter_parameters.rb
@@ -1,5 +1,6 @@
require 'active_support/core_ext/object/blank'
require 'active_support/core_ext/hash/keys'
+require 'active_support/core_ext/object/duplicable'
module ActionDispatch
module Http
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index 367b4ce217..02db241ee0 100755
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -13,6 +13,7 @@ require 'active_support/core_ext/hash/slice'
require 'active_support/core_ext/string/behavior'
require 'active_support/core_ext/object/singleton_class'
require 'active_support/core_ext/module/delegation'
+require 'active_support/core_ext/object/duplicable'
require 'arel'
require 'active_record/errors'
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb b/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb
index 020acbbe5a..1e095110f2 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/duplicable'
+
module ActiveRecord
module ConnectionAdapters # :nodoc:
module QueryCache
diff --git a/activeresource/lib/active_resource/base.rb b/activeresource/lib/active_resource/base.rb
index 67296a171a..5cfe4f7c7d 100644
--- a/activeresource/lib/active_resource/base.rb
+++ b/activeresource/lib/active_resource/base.rb
@@ -9,6 +9,7 @@ require 'active_support/core_ext/module/aliasing'
require 'active_support/core_ext/object/blank'
require 'active_support/core_ext/object/misc'
require 'active_support/core_ext/object/to_query'
+require 'active_support/core_ext/object/duplicable'
require 'set'
require 'uri'