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-rw-r--r--activesupport/lib/active_support/cache.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activesupport/lib/active_support/cache.rb b/activesupport/lib/active_support/cache.rb
index 9711ed6f73..7d032ca984 100644
--- a/activesupport/lib/active_support/cache.rb
+++ b/activesupport/lib/active_support/cache.rb
@@ -91,7 +91,7 @@ module ActiveSupport
def retrieve_cache_key(key)
case
when key.respond_to?(:cache_key) then key.cache_key
- when key.is_a?(Array) then key.map { |element| retrieve_cache_key(element) }.to_param
+ when key.is_a?(Array) then ['Array', *key.map { |element| retrieve_cache_key(element) }].to_param
else key.to_param
end.to_s
end