naruse	2011-08-01 12:10:02 +0900 (Mon, 01 Aug 2011)

  New Revision: 32791

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=32791

  Log:
    * insns.def (concatstrings): don't use initial ASCII-8BIT string.
      [ruby-core:38635] [Bug #5126]

  Modified files:
    trunk/ChangeLog
    trunk/insns.def

Index: ChangeLog
===================================================================
--- ChangeLog	(revision 32790)
+++ ChangeLog	(revision 32791)
@@ -1,3 +1,8 @@
+Mon Aug  1 12:00:35 2011  NARUSE, Yui  <naruse@r...>
+
+	* insns.def (concatstrings): don't use initial ASCII-8BIT string.
+	  [ruby-core:38635] [Bug #5126]
+
 Sun Jul 31 22:57:16 2011  Yuki Sonoda (Yugui)  <yugui@y...>
 
 	* enc/Makefile.in (ECHO1): Same as the recent fix in common.mk.
Index: insns.def
===================================================================
--- insns.def	(revision 32790)
+++ insns.def	(revision 32791)
@@ -392,9 +392,9 @@
 (...)
 (VALUE val) // inc += 1 - num;
 {
-    rb_num_t i = num;
+    rb_num_t i = num - 1;
 
-    val = rb_str_new(0, 0);
+    val = rb_str_resurrect(TOPN(i));
     while (i-- > 0) {
 	const VALUE v = TOPN(i);
 	rb_str_append(val, v);

--
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