From 754adbee91c2d4a4e84e9271724ca33f630d1916 Mon Sep 17 00:00:00 2001
From: Shugo Maeda <shugo@ruby-lang.org>
Date: Fri, 20 Aug 2021 10:42:01 +0900
Subject: Module#ancestors should not return superclasses of refinements

[ruby-core:86949] [Bug #14744]

Reported by Eregon (Benoit Daloze).  Thanks!
---
 test/ruby/test_refinement.rb | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'test/ruby')

diff --git a/test/ruby/test_refinement.rb b/test/ruby/test_refinement.rb
index 14c112f344..822de47f6a 100644
--- a/test/ruby/test_refinement.rb
+++ b/test/ruby/test_refinement.rb
@@ -2559,6 +2559,18 @@ class TestRefinement < Test::Unit::TestCase
     assert_equal(:refined, Bug17822::Client.call_foo)
   end
 
+  def test_ancestors
+    refinement = nil
+    as = nil
+    Module.new do
+      refine Array do
+        refinement = self
+        as = ancestors
+      end
+    end
+    assert_equal([refinement], as, "[ruby-core:86949] [Bug #14744]")
+  end
+
   private
 
   def eval_using(mod, s)
-- 
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