From a974041b0ef744c102b2b15ff30b91b4b0ea8a1c Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 30 Dec 2015 00:58:58 +0000
Subject: object.c: fix prepend cmp

* object.c (rb_class_inherited_p): search the corresponding
  ancestor to prepended module from prepending class itself.
  [ruby-core:72493] [Bug #11878]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53380 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_module.rb | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'test/ruby')

diff --git a/test/ruby/test_module.rb b/test/ruby/test_module.rb
index 55678e42a8..6b7c0da4a2 100644
--- a/test/ruby/test_module.rb
+++ b/test/ruby/test_module.rb
@@ -1566,6 +1566,12 @@ class TestModule < Test::Unit::TestCase
     end
   end
 
+  def test_prepend_CMP
+    bug11878 = '[ruby-core:72493] [Bug #11878]'
+    assert_equal(-1, C1 <=> M2)
+    assert_equal(+1, M2 <=> C1, bug11878)
+  end
+
   def test_prepend_inheritance
     bug6654 = '[ruby-core:45914]'
     a = labeled_module("a")
-- 
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