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-rw-r--r--activesupport/lib/active_support/json/encoding.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activesupport/lib/active_support/json/encoding.rb b/activesupport/lib/active_support/json/encoding.rb
index f65c831e04..7a5c351ca8 100644
--- a/activesupport/lib/active_support/json/encoding.rb
+++ b/activesupport/lib/active_support/json/encoding.rb
@@ -65,7 +65,7 @@ module ActiveSupport
# they can detect circular references.
options.merge(:encoder => self)
else
- options
+ options.dup
end
end