bug#10393: 24.0.92; missing files in Dired

bug#10393: 24.0.92; missing files in Dired

[Richard Stallman]

I can't reproduce this, but I have seen it several times.

I have a Dired buffer displaying the directory ~/outgoing.  I type g,
and some file whose name starts in .# does not show up.
I see that file when I type ls outside Emacs, but it is missing
from the Dired buffer.



In GNU Emacs 24.0.92.1 (mips64el-unknown-linux-gnu, GTK+ Version 2.12.12)
 of 2011-12-06 on theobromine2
configured using `configure  '-C' 'CFLAGS=-g -O1''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: RMAIL

Minor modes in effect:
  diff-auto-refine-mode: t
  shell-dirtrack-mode: t
  gpm-mouse-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t
  abbrev-mode: t

Recent input:
p o s DEL DEL DEL m p o s e d RET o p n SPC G r e e 
e DEL c e C-a C-f C-d C-e , SPC i t SPC a l s o SPC 
s h o w s SPC t h a t SPC p e o p l e SPC s h o u l 
SPC DEL d SPC h a v e SPC f e w e r SPC c h i l d r 
e n . C-c C-c d x SPC d d x d x SPC d SPC d d d d x 
C-x C-s d d x d x d x d u b C-x b R TAB RET n d d d 
x d d d d x C-x C-s p p n p n r W h e n SPC I SPC h 
a v e SPC t i m e , SPC I SPC w i l l SPC s t u d y 
SPC t h e SPC a r g u m e n t s SPC o n SPC b o t h 
SPC s i d e s SPC a g a i n . RET C-c C-c C-d x p SPC 
SPC ESC v SPC SPC SPC SPC . 1 r T h a k s . C-b C-b 
C-b n C-e SPC SPC N o t h i n g SPC r e a l l y SPC 
n e w SPC i n SPC i t . C-c C-c C-d x 5 0 0 j x n C-d 
d x n n x ESC x r e p o r t SPC e m a c s SPC b v u 
g DEL DEL DEL u g RET

Recent messages:
Wrote /home/rms/RMAIL [2 times]
Sending...
Wrote /home/rms/outgoing/out-61
Sending...done
Expunging deleted messages...done
Sending...
Wrote /home/rms/outgoing/out-62
Sending...done
Expunging deleted messages...done
Expunging deleted messages...done

Load-path shadows:
None found.

Features:
(shadow emacsbug info edmacro kmacro debug tex-mode latexenc log-view
vc-rcs sh-script executable diff-mode ansi-color compare-w log-edit
easy-mmode pcvs-util add-log vc ediff-merg ediff-diff ediff-wind
ediff-help ediff-util ediff-mult ediff-init ediff vc-dispatcher
rmailsum epa-mail epa derived epg epg-config rect time-stamp texinfo
goto-addr thingatpt vc-bzr lpr parse-time vc-cvs sgml-mode tar-mode
utf-7 novice etach rmailkwd mule-util cal-move cal-menu calendar
cal-loaddefs dired-aux ind-util etags ispell multi-isearch rmailout
shell pcomplete grep compile comint ring newcomment quail help-mode
view dabbrev mailalias jka-compr qp rmailmm message sendmail
format-spec rfc822 mml easymenu mml-sec mm-decode mm-bodies mm-encode
mailabbrev gmm-utils mailheader mail-parse rfc2231 rmail rfc2047
rfc2045 ietf-drums mm-util mail-prsvr mail-utils dired regexp-opt
t-mouse time-date battery paren cus-start cus-load tooltip ediff-hook
vc-hooks lisp-float-type mwheel x-win x-dnd tool-bar dnd fontset image
fringe lisp-mode register page menu-bar rfn-eshadow timer select
scroll-bar mouse jit-lock font-lock syntax facemenu font-core frame
cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet
lao korean japanese hebrew greek romanian slovak czech european
ethiopic indian cyrillic chinese case-table epa-hook jka-cmpr-hook
help simple abbrev minibuffer loaddefs button faces cus-face files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote make-network-process
dbusbind dynamic-setting system-font-setting font-render-setting
move-toolbar gtk x-toolkit x multi-tty emacs)


-- 
Dr Richard Stallman
President, Free Software Foundation
51 Franklin St
Boston MA 02110
USA
www.fsf.org  www.gnu.org
Skype: No way! That's nonfree (freedom-denying) software.
  Use free telephony http://directory.fsf.org/category/tel/

bug#10393: 24.0.92; missing files in Dired

[Eli Zaretskii]

> Date: Wed, 28 Dec 2011 18:26:42 -0500
> From: Richard Stallman <rms@gnu.org>
> Reply-To: rms@gnu.org
> 
> I can't reproduce this, but I have seen it several times.
> 
> I have a Dired buffer displaying the directory ~/outgoing.  I type g,
> and some file whose name starts in .# does not show up.
> I see that file when I type ls outside Emacs, but it is missing
> from the Dired buffer.

When it does happen, is it reproducible?  That is, if you repeatedly
type `g', does that file never show up?  If so, could you perhaps step
in a debugger through dired-redin and its subroutines, when you do
encounter the bug, and see what is going on there?

Btw, does that happen in Dired buffers that read the entire directory,
or buffers that show only some files specified by a wildcard (or
both)?

bug#10393: 24.0.92; missing files in Dired

[Richard Stallman]

    When it does happen, is it reproducible?  That is, if you repeatedly
    type `g', does that file never show up?

My memory is not firm, but I think it never shows up.

However, if I start a new Emacs, then the file appears.
(I think it also appears if I kill the buffer and make a new one.)
That is an obstacle to using GDB on it.

    Btw, does that happen in Dired buffers that read the entire directory,
    or buffers that show only some files specified by a wildcard (or
    both)?

I have only seen the problem in buffers visiting an entire directory.
However, my usage of Dired buffers with wildcards is much more infrequent,
so I have no evidence about whether the problem can happen in them.

-- 
Dr Richard Stallman
President, Free Software Foundation
51 Franklin St
Boston MA 02110
USA
www.fsf.org  www.gnu.org
Skype: No way! That's nonfree (freedom-denying) software.
  Use free telephony http://directory.fsf.org/category/tel/

bug#10393: 24.0.92; missing files in Dired

[Eli Zaretskii]

> Date: Fri, 30 Dec 2011 00:49:40 -0500
> From: Richard Stallman <rms@gnu.org>
> CC: 10393@debbugs.gnu.org
> 
> However, if I start a new Emacs, then the file appears.
> (I think it also appears if I kill the buffer and make a new one.)

That is strange: typing `g' in a Dired buffer showing a complete
directory does the same as reading that directory in the first time.
So I guess there's some subtle issue with dired-insert-directory vs
dired-readin.

My suggestion is still to step with Edebug through Dired functions
invoked by `g', when this problem happens.

bug#10393: 24.0.92; missing files in Dired

[Richard Stallman]

    My suggestion is still to step with Edebug through Dired functions
    invoked by `g', when this problem happens.

Ok, I will try that if I see it again.

-- 
Dr Richard Stallman
President, Free Software Foundation
51 Franklin St
Boston MA 02110
USA
www.fsf.org  www.gnu.org
Skype: No way! That's nonfree (freedom-denying) software.
  Use free telephony http://directory.fsf.org/category/tel/

bug#10393: 24.0.92; missing files in Dired

[Paul Eggert]

Possibly you have dired-x loaded and typed M-o
by accident.  This invokes dired-omit-mode, which
causes "uninteresting" files to not be displayed.
By default, files starting with .# are uninteresting.

If my guess is right, you can type M-o again
to toggle the flag, and make the .#* files visible again.

bug#10393: 24.0.92; missing files in Dired

[Chong Yidong]

Paul Eggert <eggert@cs.ucla.edu> writes:

> Possibly you have dired-x loaded and typed M-o
> by accident.  This invokes dired-omit-mode, which
> causes "uninteresting" files to not be displayed.
> By default, files starting with .# are uninteresting.
>
> If my guess is right, you can type M-o again
> to toggle the flag, and make the .#* files visible again.

I think we have a winner.  Closing this bug; if it turns out to be a
different issue, please reopen.