From 11a21f19310bf72c6bc75efb1ad66030d2b4d1a7 Mon Sep 17 00:00:00 2001
From: Vera Olsson <vera.olsson@shopify.com>
Date: Fri, 29 Nov 2024 12:17:05 +0100
Subject: [PATCH] Freeze OPTION_NOT_GIVEN

---
 activemodel/lib/active_model/attribute_mutation_tracker.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/activemodel/lib/active_model/attribute_mutation_tracker.rb b/activemodel/lib/active_model/attribute_mutation_tracker.rb
index a683a94ff7ae2..239c6a9353cf9 100644
--- a/activemodel/lib/active_model/attribute_mutation_tracker.rb
+++ b/activemodel/lib/active_model/attribute_mutation_tracker.rb
@@ -5,7 +5,7 @@
 
 module ActiveModel
   class AttributeMutationTracker # :nodoc:
-    OPTION_NOT_GIVEN = Object.new
+    OPTION_NOT_GIVEN = Object.new.freeze
 
     def initialize(attributes)
       @attributes = attributes