GNU bug report logs - #1589
23.0.60; vc-dir erroneously reports "No changes between working revision and workfile"

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Message #5 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Eric Hanchrow <eric.hanchrow <at> gmail.com>
To: emacs-pretest-bug <at> gnu.org
Subject: 23.0.60; vc-dir erroneously reports "No changes between working revision and workfile"
Date: Mon, 15 Dec 2008 19:54:07 -0800

Please write in English if possible, because the Emacs maintainers
usually do not have translators to read other languages for them.

Your bug report will be posted to the emacs-pretest-bug <at> gnu.org mailing list.

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

Edit the third line of this script to point to your Emacs, and then run it.

  #!/bin/sh -x

  EMACS=/usr/local/src/emacs-with-my-tweaks.git/src/emacs

  cd /tmp
  rm -rf xyzzy

  mkdir xyzzy
  cd xyzzy
  git init
  mkdir Jack Jill
  touch Jack/it Jill/it
  git add .
  git commit -m "golly!"
  echo More stuff >> Jack/it
  cd Jill

  git status
  # You should see this output:
  
  # On branch master
  # Changed but not updated:
  #   (use "git add <file>..." to update what will be committed)
  #   (use "git checkout -- <file>..." to discard changes in working directory)
  #
  #       modified:   ../Jack/it
  #

  $EMACS -Q \
      --eval '(cd "/tmp/xyzzy/Jill")' \
      --eval '(vc-dir "/tmp/xyzzy/Jill")'

  # note that we're now looking at something like

  #   VC backend : Git
  #   Working dir: /tmp/xyzzy/Jill/
  #   Branch     : master
  #   
  #                             ./
  #                             Jack/
  #        edited               Jack/it
  #   
  #   

  # That seems a bit odd, since the name "Jack/it" doesn't name anything
  # at all when interpreted relative to /tmp/xyzzy/Jill.

  # Furthermore, if you move point to "Jack/it" (by typing "n" twice),
  # and then invoke vc-diff by typing "=", Emacs will respond with "No
  # changes between working revision and workfile", which is wrong; the
  # file is indeed modified.

If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
If you would like to further debug the crash, please read the file
/usr/local/src/emacs/etc/DEBUG for instructions.


In GNU Emacs 23.0.60.3 (i686-pc-linux-gnu, GTK+ Version 2.14.4)
 of 2008-12-14 on debian
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: nil
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default-enable-multibyte-characters: t

Major mode: Shell

Minor modes in effect:
  erc-ring-mode: t
  erc-pcomplete-mode: t
  erc-netsplit-mode: t
  erc-button-mode: t
  erc-fill-mode: t
  erc-stamp-mode: t
  erc-autojoin-mode: t
  erc-track-mode: t
  erc-track-minor-mode: t
  erc-match-mode: t
  erc-services-mode: t
  erc-networks-mode: t
  erc-irccontrols-mode: t
  erc-noncommands-mode: t
  erc-readonly-mode: t
  desktop-save-mode: t
  display-time-mode: t
  global-auto-revert-mode: t
  diff-auto-refine-mode: t
  shell-dirtrack-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
E T RET o o t TAB C-c C-u C-c C-@ C-c C-@ C-c C-@ 0 
_ o RET C-u C-p C-u C-p C-u C-p ESC b RET ESC > t h 
a t SPC p i x DEL c SPC i s SPC a i r b r u s h e d 
SPC b e y o n d SPC r e c o g n i t i o n RET C-c C-@ 
/ m e SPC a h o y s , SPC b e l ESC / RET C-r < e l 
i > ESC > e l i TAB : SPC b e l a t e d SPC p o n g 
RET C-c C-@ C-c C-@ C-c C-@ C-c C-@ C-c C-@ t o o f 
l e DEL DEL DEL d l e - o o RET C-c C-@ C-x d C-g C-x 
b s c h RET y e p RET w a i t . RET i s n ' t SPC " 
I R L " SPC I r e l a n d ? RET C-x b s h e RET c d 
RET c d SPC d o o TAB m z TAB DEL DEL s c TAB ESC DEL 
s c TAB ESC DEL a n TAB s c TAB m z TAB RET g i t SPC 
s t a t u s RET C-x d RET g C-n RET ESC O ESC C-o ESC 
C-o o # DEL DEL # SPC O h SPC w o w ! ! C-x C-s C-x 
k RET C-x v d RET n n = q ESC x r e p o r t - e m c 
a s TAB DEL DEL DEL a TAB RET

Recent messages:
Completed
No completions of doodles/mz
Completing file name...
No completions of doodles/mz
Completed [4 times]
Partially completed
~/doodles/anagrams/scheme/mzscheme 
Wrote /home/erich/doodles/anagrams/scheme/mzscheme/GNUmakefile
Finding changes in /home/erich/doodles/anagrams/scheme/mzscheme/scheme/mzscheme/GNUmakefile...
No changes between working revision and workfile

-- 
If there were a little guy running around inside the computer
executing our programs, he would probably have as long and
plaintive a tale to tell about his job as a federal government
employee.
        -- Paul Graham

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