[bash 4.2] In vi mode, cc failed to change the whole line

[Clark J. Wang]

For example, in vi insert mode, I first enter a command like this:

# hello world

Then I press ESC and type cc, the cursor just moves to the beginning (under
the char `h') and the whole line is not emptied. If I type more chars after
cc, only the first `h' char is replaced and following `ello world' keeps
unchanged. Note that other vi mode commands like cw and c$ work fine.

I'm using Debian 6.0 (i686) and here's some of my system info:

# bash --version
GNU bash, version 4.2.0(1)-release (i686-pc-linux-gnu)
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html
>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
# dpkg -l | grep -E 'readline|ncurses'
ii  libncurses5                        5.7+20100313-5               shared
libraries for terminal handling
ii  libncurses5-dev                    5.7+20100313-5
developer's libraries and docs for ncurses
ii  libncursesw5                       5.7+20100313-5               shared
libraries for terminal handling (wide character support)
ii  libreadline5                       5.2-7                        GNU
readline and history libraries, run-time libraries
ii  libreadline6                       6.1-3                        GNU
readline and history libraries, run-time libraries
ii  ncurses-base                       5.7+20100313-5               basic
terminal type definitions
ii  ncurses-bin                        5.7+20100313-5
terminal-related programs and man pages
ii  ncurses-term                       5.7+20100313-5
additional terminal type definitions
ii  readline-common                    6.1-3                        GNU
readline and history libraries, common files
# ldd /usr/local/bash-4.2.0/bin/bash
        linux-gate.so.1 =>  (0xb7730000)
        libncurses.so.5 => /lib/libncurses.so.5 (0xb76ec000)
        libdl.so.2 => /lib/i686/cmov/libdl.so.2 (0xb76e8000)
        libc.so.6 => /lib/i686/cmov/libc.so.6 (0xb75a1000)
        /lib/ld-linux.so.2 (0xb7731000)
#

By the way I don't understand why there's no libreadline in the output of
`ldd bash'. Anyone can explain?

-- 
Clark