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-rw-r--r--activesupport/lib/active_support/cache/strategy/local_cache.rb5
1 files changed, 4 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 39b32fc7f6..4ca084163b 100644
--- a/activesupport/lib/active_support/cache/strategy/local_cache.rb
+++ b/activesupport/lib/active_support/cache/strategy/local_cache.rb
@@ -75,7 +75,10 @@ module ActiveSupport
end
def fetch_entry(key, options = nil) # :nodoc:
- @data.fetch(key) { @data[key] = yield }
+ entry = @data.fetch(key) { @data[key] = yield }
+ dup_entry = entry.dup
+ dup_entry&.dup_value!
+ dup_entry
end
end