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-rw-r--r--activemodel/lib/active_model/validations/validates.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activemodel/lib/active_model/validations/validates.rb b/activemodel/lib/active_model/validations/validates.rb
index 8e09f6ac35..0e6b349e94 100644
--- a/activemodel/lib/active_model/validations/validates.rb
+++ b/activemodel/lib/active_model/validations/validates.rb
@@ -80,7 +80,7 @@ module ActiveModel
# validates :password, :presence => true, :confirmation => true, :if => :password_required?
#
def validates(*attributes)
- defaults = attributes.extract_options!
+ defaults = attributes.extract_options!.dup
validations = defaults.slice!(*_validates_default_keys)
raise ArgumentError, "You need to supply at least one attribute" if attributes.empty?