Redisplay bug with wrapping prompt

[schwab]

Configuration Information [Automatically generated, do not change]:
Machine: ia64
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='ia64' 
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='ia64-unknown-linux-gnu' 
-DCONF_VENDOR='unknown' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' 
-DSHELL -DHAVE_CONFIG_H   -I.  -I. -I./include -I./lib   -O2 -g
uname output: Linux sykes 2.6.18.2-33-default #1 SMP Mon Nov 27 11:46:27 UTC 
2006 ia64 ia64 ia64 GNU/Linux
Machine Type: ia64-unknown-linux-gnu

Bash Version: 3.2
Patch Level: 17
Release Status: release

Description:
        If the prompt contains invisible characters and its rendered size
        is wider then the terminal then readline fails to redisplay
        correctly.  That is especially visible when scrolling through
        the history.

Repeat-By:
        $ mkdir 
/tmp/12345678901234567890123456789012345678901234567890123456789012345678901234567890
        $ cd 
/tmp/12345678901234567890123456789012345678901234567890123456789012345678901234567890
        $ PS1="\[$(tput bold)\]\w\\\$\[$(tput sgr0)\] "