From b2ac99dfa3328ff37bad39bf069a5f9e6f1621c8 Mon Sep 17 00:00:00 2001
From: naruse <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 13 Apr 2009 02:40:20 +0000
Subject: * sprintf.c (rb_str_format): optimize previous commit.  
 [ruby-list:45954]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@23187 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 sprintf.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'sprintf.c')

diff --git a/sprintf.c b/sprintf.c
index 2bcf138c27..c276761bf2 100644
--- a/sprintf.c
+++ b/sprintf.c
@@ -660,7 +660,8 @@ rb_str_format(int argc, const VALUE *argv, VALUE fmt)
 		str = rb_obj_as_string(arg);
 		if (OBJ_TAINTED(str)) tainted = 1;
 		len = RSTRING_LEN(str);
-		enc = rb_enc_check(rb_str_substr(result, 0, blen), str);
+		rb_str_set_len(result, blen);
+		enc = rb_enc_check(result, str);
 		if (flags&(FPREC|FWIDTH)) {
 		    slen = rb_enc_strlen(RSTRING_PTR(str),RSTRING_END(str),enc);
 		    if (slen < 0) {
-- 
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