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-rw-r--r--activerecord/lib/active_record/persistence.rb1
1 files changed, 0 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/persistence.rb b/activerecord/lib/active_record/persistence.rb
index a87b9e7db2..bf2f61737b 100644
--- a/activerecord/lib/active_record/persistence.rb
+++ b/activerecord/lib/active_record/persistence.rb
@@ -568,7 +568,6 @@ module ActiveRecord
became.send(:initialize)
became.instance_variable_set("@attributes", @attributes)
became.instance_variable_set("@mutations_from_database", @mutations_from_database ||= nil)
- became.instance_variable_set("@changed_attributes", attributes_changed_by_setter)
became.instance_variable_set("@new_record", new_record?)
became.instance_variable_set("@destroyed", destroyed?)
became.errors.copy!(errors)