Merge pull request #50655 from Earlopain/enable-lint-safe-navigation-chain

Enable `Lint/SafeNavigationChain` rubocop cop

.rubocop.yml

@@ -272,6 +272,9 @@ Lint/InterpolationCheck:
   Exclude:
     - '**/test/**/*'
 
+Lint/SafeNavigationChain:
+  Enabled: true
+
 Style/EvalWithLocation:
   Enabled: true
   Exclude:

activerecord/lib/active_record/encryption/encryptable_record.rb

@@ -221,7 +221,7 @@ module ActiveRecord
         end
 
         def cant_modify_encrypted_attributes_when_frozen
-          self.class&.encrypted_attributes.each do |attribute|
+          self.class.encrypted_attributes.each do |attribute|
             errors.add(attribute.to_sym, "can't be modified because it is encrypted") if changed_attributes.include?(attribute)
           end
         end