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bug#4041: 23.0.92; Emacs 23: buffer point is no longer frame-local
From: |
Steve Yegge |
Subject: |
bug#4041: 23.0.92; Emacs 23: buffer point is no longer frame-local |
Date: |
Tue, 4 Aug 2009 17:17:35 -0700 (PDT) |
1) emacs -q (with non-nil window-system)
2) find-file /usr/share/dict/words
- any file longer than ~3x the frame height should serve to demonstrate
- in remaining steps I'll call this file buffer BUF
3) (goto-char (/ (point-max) 2))
4) (new-frame)
5) (other-frame) ; if necessary to put point in new frame
6) switch to buffer BUF
7) (goto-char (point-min))
8) switch to buffer *scratch* (or any other buffer)
9) switch to buffer BUF
Observe that point has returned to (/ (point-max) 2).
In Emacs 22, buffer point behaved as if it were frame-local:
at step 9, point would still be at (point-min).
This change may seem innocuous, but it can be quite frustrating and
mysterious if you have a multi-tty frame open at another site.
The buffer point behaves as if it's "stuck": every time you switch
away from the buffer and return, the point has returned to its
sticky position.
The behavior exhibits in both multi-tty and single-tty flavors, but
is easier to trigger in a long-running multi-tty session distributed
over multiple sites (e.g. home and work). It was serious enough to
In GNU Emacs 23.0.92.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.12.9)
of 2009-04-14 on stevey.krc.corp.google.com
Windowing system distributor `The X.Org Foundation', version 11.0.60900000
configured using `configure '--prefix=/home/stevey/no_crawl/emacs-cvs''
Important settings:
value of $LC_ALL: nil
value of $LC_COLLATE: C
value of $LC_CTYPE: nil
value of $LC_MESSAGES: nil
value of $LC_MONETARY: C
value of $LC_NUMERIC: C
value of $LC_TIME: C
value of $LANG: en_US.UTF-8
value of $XMODIFIERS: nil
locale-coding-system: utf-8-unix
default-enable-multibyte-characters: t
Major mode: Fundamental
Minor modes in effect:
shell-dirtrack-mode: t
tooltip-mode: t
tool-bar-mode: t
mouse-wheel-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-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:
<help-echo> <help-echo> M-x s h e l l <return> C-x
k <return> C-x b A <return> C-x k <return> C-x C-f
C-a C-k / u s r / s h a r e / d i c t / w o r <tab>
<return> C-x 2 C-x e M-> M-v M-v M-v C-r s t e C-a
C-u C-r ^ s C-a C-x RET n e w - f r <tab> C-e C-a M-x
n e w - f r <tab> <return> <switch-frame> <help-echo>
<help-echo> <help-echo> C-x 2 C-x o C-x t M-< C-x b
<return> C-x b w o <tab> <return> C-x o M-< C-x o C-v
C-v C-v C-v C-v C-v C-v C-x o C-x 1 C-x b <return>
C-x b w o <tab> <return> <switch-frame> M-x e <backspace>
r e p o r t - e m a c s - b u g <tab> <return>
Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Note: file is write protected
kmacro-call-macro: No kbd macro has been defined
Mark set
Mark saved where search started [2 times]
Buffer is read-only: #<buffer words> [5 times]
indent-relative: Buffer is read-only: #<buffer words>
Mark set [2 times]
- bug#4041: 23.0.92; Emacs 23: buffer point is no longer frame-local,
Steve Yegge <=