From 2458337d0a8d21b6ae0226861fc368e4a4863634 Mon Sep 17 00:00:00 2001
From: Yasuo Honda <yasuo.honda@gmail.com>
Date: Thu, 14 Dec 2017 18:44:52 +0000
Subject: Address `warning: instance variable @hash_digest_class not
 initialized`

```ruby
/path/to/rails/activesupport/lib/active_support/digest.rb:7:
warning: instance variable @hash_digest_class not initialized
``
---
 activesupport/lib/active_support/digest.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'activesupport/lib/active_support/digest.rb')

diff --git a/activesupport/lib/active_support/digest.rb b/activesupport/lib/active_support/digest.rb
index 4dac32d420..d77eeb072b 100644
--- a/activesupport/lib/active_support/digest.rb
+++ b/activesupport/lib/active_support/digest.rb
@@ -4,7 +4,7 @@ module ActiveSupport
   class Digest #:nodoc:
     class <<self
       def hash_digest_class
-        @hash_digest_class || ::Digest::MD5
+        @hash_digest_class ||= ::Digest::MD5
       end
 
       def hash_digest_class=(klass)
-- 
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