From 1f29e8e2baa548bba9e385ebbade2198b4cc3859 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 21 Feb 2014 11:42:03 +0000
Subject: class.c: do nothing if copying self

* class.c (rb_mod_init_copy): do nothing if copying self.
  [ruby-dev:47989] [Bug #9535]
* hash.c (rb_hash_initialize_copy): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45076 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ext/json/generator/generator.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'ext/json/generator/generator.c')

diff --git a/ext/json/generator/generator.c b/ext/json/generator/generator.c
index 06509ca93f..1b9652df24 100644
--- a/ext/json/generator/generator.c
+++ b/ext/json/generator/generator.c
@@ -965,6 +965,7 @@ static VALUE cState_init_copy(VALUE obj, VALUE orig)
 {
     JSON_Generator_State *objState, *origState;
 
+    if (obj == orig) return obj;
     Data_Get_Struct(obj, JSON_Generator_State, objState);
     Data_Get_Struct(orig, JSON_Generator_State, origState);
     if (!objState) rb_raise(rb_eArgError, "unallocated JSON::State");
-- 
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