From: Roland Winkler <roland.winkler@physik.uni-erlangen.de>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 6177@debbugs.gnu.org
Subject: bug#6177: 23.2; emacs crashes when reverting a file
Date: Wed, 12 May 2010 16:13:10 -0500 [thread overview]
Message-ID: <19435.6630.705828.513141@regnitz.physics.niu.edu> (raw)
In-Reply-To: <83ljbpq0pi.fsf@gnu.org>
On Wed May 12 2010 Eli Zaretskii wrote:
> > I've encountered a situation, where reverting a file reproducibly
> > crashes emacs. I do not know much about debugging emacs on this level.
> > I've reproduced the crash under gdb.
> > xbacktrace doesn't give any information.
>
> Can you show the steps to reproduce this, starting with "emacs -Q"?
I got a simpler test case that works with emacs -Q.
The point about the code below is that buffer *bar* depends on what
happens to file foo.txt visited in its own buffer: reverting buffer
*bar* really operates on the buffer visiting foo.txt.
The detailed steps to reprdouce this bug are as follows:
Create file foo.txt
cat > ~/foo.txt <<EOF
Hello world.
EOF
In "emacs -Q" load the code below. Then run my-init, touch file
foo.txt and finally move point in buffer bar which triggers
my-revert-buffer. This crashes emacs.
If the second with-current-buffer is removed from my-revert-buffer
the code runs fine.
Roland
(setq my-buffer "foo.txt")
(defun my-init ()
(interactive)
(find-file (concat "~/" my-buffer))
(my-bar))
(defun my-bar ()
(with-current-buffer (get-buffer-create "*bar*")
(erase-buffer)
(insert "acdef")
(setq revert-buffer-function 'my-revert-buffer
mode-line-buffer-identification
(list 24 (buffer-name) " "
'(:eval (format "%d" (my-revert-buffer)))))
(add-hook 'post-command-hook 'force-mode-line-update nil t)))
(defun my-revert-buffer (&optional ignore-auto noconfirm)
"My `revert-buffer-function'."
(when (or noconfirm
(not (verify-visited-file-modtime (get-buffer my-buffer))))
(with-current-buffer my-buffer
(kill-all-local-variables)
(let (revert-buffer-function) ; don't loop.
(revert-buffer ignore-auto t)))
;; the following two lines make emacs crash
(with-current-buffer (get-buffer-create "*bar*")
(erase-buffer)))
0)
next prev parent reply other threads:[~2010-05-12 21:13 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-11 23:28 bug#6177: 23.2; emacs crashes when reverting a file Roland Winkler
2010-05-12 3:05 ` Eli Zaretskii
2010-05-12 13:13 ` Roland Winkler
2010-05-12 18:13 ` Eli Zaretskii
2010-05-12 21:13 ` Roland Winkler [this message]
2010-05-26 9:18 ` Geoff Gole
2010-05-26 15:01 ` Roland Winkler
2010-05-27 15:46 ` Chong Yidong
2010-06-04 6:29 ` Gilles Pion
2010-06-07 7:04 ` Glenn Morris
2010-06-04 7:44 ` Gilles Pion
2010-06-15 12:44 ` Gilles Pion
2010-06-15 13:32 ` Stefan Monnier
2010-06-15 19:45 ` Glenn Morris
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