File CVE-2016-0753.patch of Package rubygem-activerecord-4_2.1922

diff --git a/activerecord/lib/active_record/enum.rb b/activerecord/lib/active_record/enum.rb
index 1df779e..7887991 100644
--- a/activerecord/lib/active_record/enum.rb
+++ b/activerecord/lib/active_record/enum.rb
@@ -69,7 +69,7 @@ module ActiveRecord
   # Where conditions on an enum attribute must use the ordinal value of an enum.
   module Enum
     def self.extended(base) # :nodoc:
-      base.class_attribute(:defined_enums)
+      base.class_attribute(:defined_enums, instance_writer: false)
       base.defined_enums = {}
     end
 
diff --git a/activerecord/lib/active_record/reflection.rb b/activerecord/lib/active_record/reflection.rb
index 590bd6c..b46df26 100644
--- a/activerecord/lib/active_record/reflection.rb
+++ b/activerecord/lib/active_record/reflection.rb
@@ -7,8 +7,8 @@ module ActiveRecord
     extend ActiveSupport::Concern
 
     included do
-      class_attribute :_reflections
-      class_attribute :aggregate_reflections
+      class_attribute :_reflections, instance_writer: false
+      class_attribute :aggregate_reflections, instance_writer: false
       self._reflections = {}
       self.aggregate_reflections = {}
     end