From b41909f603dce3c8f48d49514c50d6813a1ca491 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 12 Sep 2014 08:13:28 +0000
Subject: vm_method.c: should not modify frozen objects

* vm_method.c (rb_method_entry_make, remove_method): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47551 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_class.rb | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'test/ruby')

diff --git a/test/ruby/test_class.rb b/test/ruby/test_class.rb
index 963c497d2f..9a4cdb0f58 100644
--- a/test/ruby/test_class.rb
+++ b/test/ruby/test_class.rb
@@ -384,4 +384,13 @@ class TestClass < Test::Unit::TestCase
       Class.new.freeze.clone.to_s
     }
   end
+
+  def test_singleton_class_of_frozen_object
+    obj = Object.new
+    c = obj.singleton_class
+    obj.freeze
+    assert_raise(RuntimeError, /frozen object/) {
+      c.class_eval {def f; end}
+    }
+  end
 end
-- 
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