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-rw-r--r--activesupport/lib/active_support/core_ext/object/deep_dup.rb1
-rw-r--r--activesupport/test/core_ext/object/deep_dup_test.rb6
2 files changed, 7 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/object/deep_dup.rb b/activesupport/lib/active_support/core_ext/object/deep_dup.rb
index 0191d2e973..ad5b2af161 100644
--- a/activesupport/lib/active_support/core_ext/object/deep_dup.rb
+++ b/activesupport/lib/active_support/core_ext/object/deep_dup.rb
@@ -40,6 +40,7 @@ class Hash
# dup[:a][:c] # => "c"
def deep_dup
each_with_object(dup) do |(key, value), hash|
+ hash.delete(key)
hash[key.deep_dup] = value.deep_dup
end
end
diff --git a/activesupport/test/core_ext/object/deep_dup_test.rb b/activesupport/test/core_ext/object/deep_dup_test.rb
index 91d558dbb5..38fbe1f836 100644
--- a/activesupport/test/core_ext/object/deep_dup_test.rb
+++ b/activesupport/test/core_ext/object/deep_dup_test.rb
@@ -50,4 +50,10 @@ class DeepDupTest < ActiveSupport::TestCase
assert dup.instance_variable_defined?(:@a)
end
+ def test_deep_dup_with_hash_class_key
+ hash = { Fixnum => 1 }
+ dup = hash.deep_dup
+ assert_equal dup.keys.length, 1
+ end
+
end