From 44cf56d6e70dbe06a160b004494ba40dd4cfb426 Mon Sep 17 00:00:00 2001
From: matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 22 Jun 2000 08:29:58 +0000
Subject: 2000-06-22

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@775 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 hash.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'hash.c')

diff --git a/hash.c b/hash.c
index e66ab126e9..a8251dac7f 100644
--- a/hash.c
+++ b/hash.c
@@ -268,8 +268,13 @@ static VALUE
 rb_hash_dup(hash)
     VALUE hash;
 {
+    VALUE klass = CLASS_OF(hash);
+
     NEWOBJ(dup, struct RHash);
-    OBJSETUP(dup, CLASS_OF(hash), T_HASH);
+    while (TYPE(klass) == T_ICLASS || FL_TEST(klass, FL_SINGLETON)) {
+	klass = (VALUE)RCLASS(klass)->super;
+    }
+    OBJSETUP(dup, klass, T_HASH);
 
     dup->iter_lev = 0;
     dup->ifnone = RHASH(hash)->ifnone;
-- 
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