Merge pull request #20828 from Sirupsen/hash-indifferent-dup-default-proc

active_support/indifferent_access: fix not raising when default_proc does

1 files changed, 12 insertions, 2 deletions

diff --git a/activesupport/lib/active_support/hash_with_indifferent_access.rb b/activesupport/lib/active_support/hash_with_indifferent_access.rb
index 4f71f13971..63690a1342 100644
--- a/activesupport/lib/active_support/hash_with_indifferent_access.rb
+++ b/activesupport/lib/active_support/hash_with_indifferent_access.rb
@@ -188,7 +188,7 @@ module ActiveSupport
     #   dup[:a][:c]  # => "c"
     def dup
       self.class.new(self).tap do |new_hash|
-        new_hash.default = default
+        set_defaults(new_hash)
       end
     end
 
@@ -247,7 +247,9 @@ module ActiveSupport
 
     # Convert to a regular hash with string keys.
     def to_hash
-      _new_hash = Hash.new(default)
+      _new_hash = Hash.new
+      set_defaults(_new_hash)
+
       each do |key, value|
         _new_hash[key] = convert_value(value, for: :to_hash)
       end
@@ -275,6 +277,14 @@ module ActiveSupport
           value
         end
       end
+
+      def set_defaults(target)
+        if default_proc
+          target.default_proc = default_proc.dup
+        else
+          target.default = default
+        end
+      end
   end
 end