前田です。

ごめんなさい、Readline::HISTORYでバグがありました。
パッチです。

-- 
前田 修吾

diff -u /home/shugo/src/ruby-1.1a2/ext/readline/readline.c.orig /home/shugo/src/ruby-1.1a2/ext/readline/readline.c
--- /home/shugo/src/ruby-1.1a2/ext/readline/readline.c.orig	Wed Aug 27 01:09:52 1997
+++ /home/shugo/src/ruby-1.1a2/ext/readline/readline.c	Wed Aug 27 01:09:52 1997
@@ -3,7 +3,7 @@
  * module for GNU Readline Library
  *
  * Author: maeda shugo <shugo / po.aianet.ne.jp>
- * Version: $Id: readline.c,v 1.2 1997/08/21 10:41:33 shugo Exp $
+ * Version: $Id: readline.c,v 1.3 1997/08/26 16:09:29 shugo Exp $
  *
  * Usage:
  *
@@ -231,7 +231,7 @@
 
     state = history_get_history_state();
     for (i = 0; i < state->length; i++) {
-	rb_yield(state->entries[i]);
+	rb_yield(str_new2(state->entries[i]->line));
     }
     return Qnil;
 }