From 3dcd5ddbb6292093f04a5d7c062933e14828d52e Mon Sep 17 00:00:00 2001
From: aycabta <aycabta@gmail.com>
Date: Sun, 17 May 2020 18:45:39 +0900
Subject: [PATCH] Check uninitialized instance variable in test

---
 test/rdoc/support/test_case.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/rdoc/support/test_case.rb b/test/rdoc/support/test_case.rb
index bce480252f..6d397625e8 100644
--- a/test/rdoc/support/test_case.rb
+++ b/test/rdoc/support/test_case.rb
@@ -76,7 +76,7 @@ def g.file_dir() end
   # Abstract test-case teardown
 
   def teardown
-    ENV["HOME"] = @orig_home
+    ENV["HOME"] = @orig_home if defined?(@orig_home)
 
     super
   end