From c9caea64c81a2679ea7c832173aa3e30aa931f3e Mon Sep 17 00:00:00 2001
From: Daniel Bovensiepen <daniel@bovensiepen.net>
Date: Sun, 9 Jun 2013 11:21:51 +0800
Subject: Singleton raises TypeError on #new

---
 src/class.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src')

diff --git a/src/class.c b/src/class.c
index f446c56bc..f94f9a933 100644
--- a/src/class.c
+++ b/src/class.c
@@ -1047,6 +1047,9 @@ mrb_instance_new(mrb_state *mrb, mrb_value cv)
   mrb_value *argv;
   int argc;
 
+  if (c->tt == MRB_TT_SCLASS)
+    mrb_raise(mrb, E_TYPE_ERROR, "can't create instance of singleton class");
+
   if (ttype == 0) ttype = MRB_TT_OBJECT;
   o = (struct RObject*)mrb_obj_alloc(mrb, ttype, c);
   obj = mrb_obj_value(o);
-- 
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