From 646e2efaef83f789632260bc88a154506c9b25af Mon Sep 17 00:00:00 2001
From: naruse <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 9 Feb 2009 02:35:38 +0000
Subject: * io.c (io_encoding_set): ignore second argument when external and  
 internal are same. [ruby-dev:37939]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@22146 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 io.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'io.c')

diff --git a/io.c b/io.c
index 9cac7631c4..6f0b9d034f 100644
--- a/io.c
+++ b/io.c
@@ -7024,6 +7024,10 @@ io_encoding_set(rb_io_t *fptr, VALUE v1, VALUE v2, VALUE opt)
 	    }
 	    else
 		enc = rb_to_encoding(v2);
+	    if (enc == enc2) {
+		/* Special case - "-" => no transcoding */
+		enc2 = NULL;
+	    }
 	}
 	else
 	    enc = rb_to_encoding(v2);
-- 
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