From http://ftp.gnu.org/pub/gnu/readline/readline-6.3-patches/readline63-006

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>

			   READLINE PATCH REPORT
			   =====================

Readline-Release: 6.3
Patch-ID: readline63-006

Bug-Reported-by:	<Trond.Endrestol@ximalas.info>
Bug-Reference-ID:	<alpine.BSF.2.03.1404192114310.1973@enterprise.ximalas.info>
Bug-Reference-URL:	http://lists.gnu.org/archive/html/bug-bash/2014-04/msg00069.html

Bug-Description:

Using reverse-i-search when horizontal scrolling is enabled does not redisplay
the entire line containing the successful search results.

Patch (apply with `patch -p0'):

*** a/readline-6.3-patched/display.c	2014-04-08 18:19:36.000000000 -0400
--- b/display.c	2014-04-20 18:32:52.000000000 -0400
***************
*** 1638,1642 ****
       the spot of first difference is before the end of the invisible chars,
       lendiff needs to be adjusted. */
!   if (current_line == 0 && !_rl_horizontal_scroll_mode &&
        current_invis_chars != visible_wrap_offset)
      {
--- 1638,1642 ----
       the spot of first difference is before the end of the invisible chars,
       lendiff needs to be adjusted. */
!   if (current_line == 0 && /* !_rl_horizontal_scroll_mode && */
        current_invis_chars != visible_wrap_offset)
      {
***************
*** 1826,1831 ****
  		_rl_last_c_pos += bytes_to_insert;
  
  	      if (_rl_horizontal_scroll_mode && ((oe-old) > (ne-new)))
! 		goto clear_rest_of_line;
  	    }
  	}
--- 1826,1836 ----
  		_rl_last_c_pos += bytes_to_insert;
  
+ 	      /* XXX - we only want to do this if we are at the end of the line
+ 		 so we move there with _rl_move_cursor_relative */
  	      if (_rl_horizontal_scroll_mode && ((oe-old) > (ne-new)))
! 		{
! 		  _rl_move_cursor_relative (ne-new, new);
! 		  goto clear_rest_of_line;
! 		}
  	    }
  	}
*** a/readline-6.3/patchlevel	2013-11-15 08:11:11.000000000 -0500
--- b/patchlevel	2014-03-21 08:28:40.000000000 -0400
***************
*** 1,3 ****
  # Do not edit -- exists only for use by patch
  
! 5
--- 1,3 ----
  # Do not edit -- exists only for use by patch
  
! 6