Merge pull request #34476 from y-yagi/fix_no_method_error_in_parallelization

Correctly handle unknown object in parallel tests

activesupport/lib/active_support/testing/parallelization.rb

@@ -15,6 +15,8 @@ def initialize
         end
 
         def record(reporter, result)
+          raise DRb::DRbConnError if result.is_a?(DRb::DRbUnknown)
+
           reporter.synchronize do
             reporter.record(result)
           end

railties/test/application/test_runner_test.rb

@@ -586,6 +586,20 @@ def initialize
       assert_match "1 runs, 0 assertions, 0 failures, 1 errors", output
     end
 
+    def test_run_in_parallel_with_unknown_object
+      create_scaffold
+      app_file "config/environments/test.rb", <<-RUBY
+        Rails.application.configure do
+          config.action_controller.allow_forgery_protection = true
+          config.action_dispatch.show_exceptions = false
+        end
+      RUBY
+
+      output = run_test_command("-n test_should_create_user")
+
+      assert_match "ActionController::InvalidAuthenticityToken", output
+    end
+
     def test_raise_error_when_specified_file_does_not_exist
       error = capture(:stderr) { run_test_command("test/not_exists.rb", stderr: true) }
       assert_match(%r{cannot load such file.+test/not_exists\.rb}, error)