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-rw-r--r--activesupport/lib/active_support/cache/strategy/local_cache.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activesupport/lib/active_support/cache/strategy/local_cache.rb b/activesupport/lib/active_support/cache/strategy/local_cache.rb
index 621358d701..d83e259a2a 100644
--- a/activesupport/lib/active_support/cache/strategy/local_cache.rb
+++ b/activesupport/lib/active_support/cache/strategy/local_cache.rb
@@ -41,7 +41,7 @@ module ActiveSupport
value
else
# forcing the value to be immutable
- value.dup
+ value.duplicable? ? value.dup : value
end
end