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bug#11556: 24.0.97; Strange behaviour of bury-buffer after desktop-read

From: Tobias Bading
Subject: bug#11556: 24.0.97; Strange behaviour of bury-buffer after desktop-read
Date: Fri, 25 May 2012 10:50:47 +0200
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20120216 Thunderbird/3.1.19


I recently switched from Emacs 23 to the current version on the emacs-24 branch (r108014) and bumped into a strange behaviour of bury-buffer at the start of a session. I'm using desktop.el and (global-set-key "\C-xy" 'bury-buffer) in .emacs (because I have a bad memory and like to bury stuff ;-). Every time I start Emacs, I see the correct buffer, i.e. the one I used before I closed Emacs previously. I edit that buffer a bit and bury it. In my case, bury-buffer switches to the wrong buffer. Instead of switching to the buffer next in line (so to speak), bury-buffer switches to what seems to be the last buffer in the list of all buffers.

Here's a little example in form of a "emacs -Q" recipe:
3 C-x C-s 3 RET
C-x b 2 RET
2 C-x C-s 2 RET
C-x b 1 RET
1 C-x C-s 1 RET
M-x desktop-save <filename>

This should leave you with with three saved buffers in the order 1-2-3 and a desktop file. C-x C-b should be able to confirm the buffer order.

Now close Emacs, start a fresh one and M-x desktop-read your desktop file. You should see buffer 1. So far, so good. Now M-x bury-buffer. I'd expect to see buffer 2 now, instead Emacs switched to buffer 3. If you C-x C-b now, you'll see that the buffer list says that buffer 2 is up front, although you're staring at buffer 3. This bug hits you only at the very beginning of a session. I can continue to bury buffers using C-x y and end up with buffers apparently from the end of the buffer list, instead of from the top. But some actions fix this, like switching a buffer once using C-x b. Afterwards the bug is nowhere to be found.

The last few days I started work with a strange I-could-swear-that-wasnt-the-file-I-was-working-on-yesterday-before-I-went-home feeling :-D. Any ideas on how to get rid of that feeling are very welcome :-).

Kind regards,


In GNU Emacs (x86_64-unknown-linux-gnu, GTK+ Version 2.20.1)
 of 2012-05-25 on pen-bld-274apcl
Windowing system distributor `The X.Org Foundation', version 11.0.10706000
Configured using:
 `configure '--prefix=...''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: POSIX
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: de_DE.utf8
  value of $LANG: en_US.utf8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
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  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
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

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