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
---
 eval.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'eval.c')

diff --git a/eval.c b/eval.c
index 90da22503e..cd91a1a735 100644
--- a/eval.c
+++ b/eval.c
@@ -409,6 +409,10 @@ rb_frozen_class_p(VALUE klass)
       noclass:
 	Check_Type(klass, T_CLASS);
     }
+    if (FL_TEST(klass, FL_SINGLETON)) {
+	VALUE obj = rb_ivar_get(klass, id__attached__);
+	if (OBJ_FROZEN(obj)) OBJ_FREEZE(klass);
+    }
     if (OBJ_FROZEN(klass)) {
 	const char *desc;
 
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