From http://ftp.gnu.org/pub/gnu/readline/readline-6.3-patches/readline63-004

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

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

Readline-Release: 6.3
Patch-ID: readline63-004

Bug-Reported-by:	Egmont Koblinger <egmont@gmail.com>
Bug-Reference-ID:	<CAGWcZk+bU5Jo1M+tutGvL-250UBE9DXjpeJVofYJSFcqFEVfMg@mail.gmail.com>
Bug-Reference-URL:	http://lists.gnu.org/archive/html/bug-bash/2014-03/msg00153.html

Bug-Description:

The signal handling changes to bash and readline (to avoid running any code
in a signal handler context) cause the cursor to be placed on the wrong
line of a multi-line command after a ^C interrupts editing.

Patch (apply with `patch -p0'):

*** a/readline-6.3-patched/display.c	2013-12-27 13:10:56.000000000 -0500
--- b/display.c	2014-03-27 11:52:45.000000000 -0400
***************
*** 2678,2682 ****
    if (_rl_echoing_p)
      {
!       _rl_move_vert (_rl_vis_botlin);
        _rl_vis_botlin = 0;
        fflush (rl_outstream);
--- 2678,2683 ----
    if (_rl_echoing_p)
      {
!       if (_rl_vis_botlin > 0)	/* minor optimization plus bug fix */
! 	_rl_move_vert (_rl_vis_botlin);
        _rl_vis_botlin = 0;
        fflush (rl_outstream);
*** 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
  
! 3
--- 1,3 ----
  # Do not edit -- exists only for use by patch
  
! 4