From db218799e8bc4217327124d6802a943b739040d4 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 16 May 2005 13:28:59 +0000
Subject: * class.c (rb_class_init_copy): singleton class is disallowed to
 copy,   from its definition.  fixed: [ruby-talk:142749]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@8469 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 class.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'class.c')

diff --git a/class.c b/class.c
index 59f608732f..b3cec55065 100644
--- a/class.c
+++ b/class.c
@@ -105,6 +105,9 @@ rb_class_init_copy(clone, orig)
     if (RCLASS(clone)->super != 0) {
 	rb_raise(rb_eTypeError, "already initialized class");
     }
+    if (FL_TEST(orig, FL_SINGLETON)) {
+	rb_raise(rb_eTypeError, "can't copy singleton class");
+    }
     return rb_mod_init_copy(clone, orig);
 }
 
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