From a818db828b3cdaae04376a64bc6800a770b0c4cb Mon Sep 17 00:00:00 2001
From: Eric Wong <e@80x24.org>
Date: Fri, 9 Jan 2015 01:47:18 +0000
Subject: tryopen: add RB_GC_GUARD for Ruby 1.8

Calling rb_intern(RSTRING_PTR(err)) was unsafe as the `err'
value could be GC-ed inside rb_intern.

This only affected Ruby 1.8 as Errno.constants returns an
array of Symbols under 1.9+

Thanks to Petr Novodvorskiy for reporting the issue.

ref: <CAHGF7iJk9-wK5WbSiAgQaRye7y2RJttLBpykRBpnKkxFi=ASHg@mail.gmail.com>
Cc: Petr Novodvorskiy <nidd@skytap.com>
Cc: Lara Martin <lmartin@skytap.com>
Cc: Nick Astete <nastete@skytap.com>
---
 ext/kgio/tryopen.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/ext/kgio/tryopen.c b/ext/kgio/tryopen.c
index 20f3f6d..d87cb17 100644
--- a/ext/kgio/tryopen.c
+++ b/ext/kgio/tryopen.c
@@ -194,4 +194,5 @@ void init_kgio_tryopen(void)
 			          ID2SYM(const_id));
 		}
 	}
+	RB_GC_GUARD(tmp);
 }
-- 
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