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+* Duplicate frozen array when assigning it to a HashWithIndifferentAccess so
+ that it doesn't raise a `RuntimeError` when calling `map!` on it in `convert_value`.
+
+ Fixes #18550.
+
+ *Aditya Kapoor*
+
* Add missing time zone definitions for Russian Federation and sync them
with `zone.tab` file from tzdata version 2014j (latest).