3 files changed, 12 insertions, 2 deletions
diff --git a/ChangeLog b/ChangeLog
index 6e2cad344..5231f7036 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+Sat Aug  1 19:23:27 2009  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* string.c (tr_trans): change condition of singlebyte
+	  optimization.
+
+Sat Aug  1 05:18:36 2009  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* string.c (tr_trans): can't use singlebyte optimization when
+	  the replacement is multibyte. [ruby-core:24612]
+
 Fri Jul 31 16:28:33 2009  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* io.c (rb_stdio_set_default_encoding): added.
diff --git a/string.c b/string.c
index c27e5d486..2017d1023 100644
--- a/string.c
+++ b/string.c
@@ -4681,7 +4681,7 @@ tr_trans(VALUE str, VALUE src, VALUE repl, int sflag)
 	    if (r == errc) r = trrepl.now;
 	    if (c < 256) {
 		trans[c] = r;
-		if (r > 255) singlebyte = 0;
+		if (rb_enc_codelen(r, enc) != 1) singlebyte = 0;
 	    }
 	    else {
 		if (!hash) hash = rb_hash_new();
diff --git a/version.h b/version.h
index e4e266d6d..e39057533 100644
--- a/version.h
+++ b/version.h
@@ -1,5 +1,5 @@
 #define RUBY_VERSION "1.9.1"
-#define RUBY_PATCHLEVEL 261
+#define RUBY_PATCHLEVEL 262
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 9
 #define RUBY_VERSION_TEENY 1