[PATCH] tryopen: add RB_GC_GUARD for Ruby 1.8

[Eric Wong <e@80x24.org>]

Hi Petr, I haven't heard from you, but I'm nearly certain adding
one RB_GC_GUARD will solve your problem and will push out the
following patch, thanks.

--------------------------8<----------------------------
From: Eric Wong <e@80x24.org>
Subject: [PATCH] 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);
 }
-- 
EW