bug#11795: 24.1.50; wdired: C-c C-c loses marks and positions of renamed files

[Michael Heerdegen <michael_heerdegen@web.de>]

Hi,

a short demonstration for emacs -Q:

1. M-x dired a directory containing some files

2. Go to the first file's line (not "." or ".."), and mark the file
with m

3. M-x wdired-change-to-wdired-mode

4. Edit the name of the first file: e.g. add a "z" to the front of the
   name so that the file will surely appear at another position after
   renaming

5. C-c C-c

You'll see that point is still at the first file's line, although the
renamed file is now displayed near the end of the buffer.  Even worse,
the mark of the file has disappeared.

Background: `wdired-finish-edit' calls `revert-buffer', which will
call `dired-revert'.  Before this is called, everything is ok.  But
`dired-revert' fails to remember the mark and the position of the
renamed file correctly.  I didn't dig any further, but I guess a
specialized revert function is needed for `wdired-finish-edit'.


Thanks,

Michael.


In GNU Emacs 24.1.50.1 (i486-pc-linux-gnu, GTK+ Version 3.4.2)
 of 2012-06-22 on zelenka, modified by Debian
 (emacs-snapshot package, version 2:20120622-1)
Windowing system distributor `The X.Org Foundation', version 11.0.11201902
Configured using:
 `configure '--build' 'i486-linux-gnu' '--host' 'i486-linux-gnu'
 '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib'
 '--localstatedir=/var' '--infodir=/usr/share/info'
 '--mandir=/usr/share/man' '--with-pop=yes'
 '--enable-locallisppath=/etc/emacs-snapshot:/etc/emacs:/usr/local/share/emacs/24.1.50/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.1.50/site-lisp:/usr/share/emacs/site-lisp'
 '--without-compress-info' '--with-crt-dir=/usr/lib/i386-linux-gnu/'
 '--with-x=yes' '--with-x-toolkit=gtk3' '--with-imagemagick=yes'
 'build_alias=i486-linux-gnu' 'host_alias=i486-linux-gnu'
 'CFLAGS=-DDEBIAN -DSITELOAD_PURESIZE_EXTRA=5000 -g -O2' 'LDFLAGS=-g
 -Wl,--as-needed -znocombreloc' 'CPPFLAGS=-D_FORTIFY_SOURCE=2''