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-rw-r--r--actionpack/lib/action_view/helpers/form_helper.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/actionpack/lib/action_view/helpers/form_helper.rb b/actionpack/lib/action_view/helpers/form_helper.rb
index 9b949100bb..ac65529352 100644
--- a/actionpack/lib/action_view/helpers/form_helper.rb
+++ b/actionpack/lib/action_view/helpers/form_helper.rb
@@ -231,7 +231,7 @@ module ActionView
DEFAULT_DATE_OPTIONS = { :discard_type => true }.freeze unless const_defined?(:DEFAULT_DATE_OPTIONS)
def initialize(object_name, method_name, template_object, local_binding = nil, object = nil)
- @object_name, @method_name = object_name.to_s, method_name.to_s
+ @object_name, @method_name = object_name.to_s.dup, method_name.to_s.dup
@template_object, @local_binding = template_object, local_binding
@object = object
if @object_name.sub!(/\[\]$/,"")