From b55217c691ba454def6dc9adb5541f6d2b69e381 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 5 Aug 2015 05:40:17 +0000
Subject: [PATCH] transcode.c: GC guards

* transcode.c (econv_init): add guards to prevent source encoding
  name and destination encoding name from GC.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51489 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 transcode.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/transcode.c b/transcode.c
index 25527e1b9f..d5add7b6e7 100644
--- a/transcode.c
+++ b/transcode.c
@@ -3391,7 +3391,10 @@ econv_init(int argc, VALUE *argv, VALUE self)
     }
 
     if (!ec) {
-        rb_exc_raise(rb_econv_open_exc(sname, dname, ecflags));
+	VALUE exc = rb_econv_open_exc(sname, dname, ecflags);
+	RB_GC_GUARD(snamev);
+	RB_GC_GUARD(dnamev);
+	rb_exc_raise(exc);
     }
 
     if (!DECORATOR_P(sname, dname)) {
@@ -3399,6 +3402,8 @@ econv_init(int argc, VALUE *argv, VALUE self)
             senc = make_dummy_encoding(sname);
         if (!denc)
             denc = make_dummy_encoding(dname);
+	RB_GC_GUARD(snamev);
+	RB_GC_GUARD(dnamev);
     }
 
     ec->source_encoding = senc;