4 files changed, 21 insertions, 13 deletions
diff --git a/activesupport/lib/active_support.rb b/activesupport/lib/active_support.rb
index 4e397ea110..b602686114 100644
--- a/activesupport/lib/active_support.rb
+++ b/activesupport/lib/active_support.rb
@@ -40,6 +40,7 @@ module ActiveSupport
   eager_autoload do
     autoload :BacktraceCleaner
     autoload :BasicObject
+    autoload :ProxyObject
     autoload :Benchmarkable
     autoload :Cache
     autoload :Callbacks
diff --git a/activesupport/lib/active_support/basic_object.rb b/activesupport/lib/active_support/basic_object.rb
index 6ccb0cd525..242b766b58 100644
--- a/activesupport/lib/active_support/basic_object.rb
+++ b/activesupport/lib/active_support/basic_object.rb
@@ -1,13 +1,7 @@
-module ActiveSupport
-  # A class with no predefined methods that behaves similarly to Builder's
-  # BlankSlate. Used for proxy classes.
-  class BasicObject < ::BasicObject
-    undef_method :==
-    undef_method :equal?
+require 'active_support/deprecation'
 
-    # Let ActiveSupport::BasicObject at least raise exceptions.
-    def raise(*args)
-      ::Object.send(:raise, *args)
-    end
-  end
+module ActiveSupport
+  # :nodoc:
+  # Deprecated in favor of ActiveSupport::ProxyObject
+  BasicObject = Deprecation::DeprecatedConstantProxy.new('ActiveSupport::BasicObject', 'ActiveSupport::ProxyObject')
 end
diff --git a/activesupport/lib/active_support/duration.rb b/activesupport/lib/active_support/duration.rb
index 7e99646117..2cb1f408b6 100644
--- a/activesupport/lib/active_support/duration.rb
+++ b/activesupport/lib/active_support/duration.rb
@@ -1,4 +1,4 @@
-require 'active_support/basic_object'
+require 'active_support/proxy_object'
 require 'active_support/core_ext/array/conversions'
 require 'active_support/core_ext/object/acts_like'
 
@@ -7,7 +7,7 @@ module ActiveSupport
   # Time#advance, respectively. It mainly supports the methods on Numeric.
   #
   #   1.month.ago       # equivalent to Time.now.advance(months: -1)
-  class Duration < BasicObject
+  class Duration < ProxyObject
     attr_accessor :value, :parts
 
     def initialize(value, parts) #:nodoc:
diff --git a/activesupport/lib/active_support/proxy_object.rb b/activesupport/lib/active_support/proxy_object.rb
new file mode 100644
index 0000000000..a2bdf1d790
--- /dev/null
+++ b/activesupport/lib/active_support/proxy_object.rb
@@ -0,0 +1,13 @@
+module ActiveSupport
+  # A class with no predefined methods that behaves similarly to Builder's
+  # BlankSlate. Used for proxy classes.
+  class ProxyObject < ::BasicObject
+    undef_method :==
+    undef_method :equal?
+
+    # Let ActiveSupport::BasicObject at least raise exceptions.
+    def raise(*args)
+      ::Object.send(:raise, *args)
+    end
+  end
+end