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-rw-r--r--actionpack/lib/action_view/helpers/form_options_helper.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/actionpack/lib/action_view/helpers/form_options_helper.rb b/actionpack/lib/action_view/helpers/form_options_helper.rb
index 8b3a37a853..49473dd129 100644
--- a/actionpack/lib/action_view/helpers/form_options_helper.rb
+++ b/actionpack/lib/action_view/helpers/form_options_helper.rb
@@ -560,7 +560,7 @@ module ActionView
def time_zone_options_for_select(selected = nil, priority_zones = nil, model = ::ActiveSupport::TimeZone)
zone_options = "".html_safe
- zones = model.all
+ zones = model.all.dup
convert_zones = lambda { |list| list.map { |z| [ z.to_s, z.name ] } }
if priority_zones