GNU bug report logs - #6060
24.0.50; Process filters can no longer kill buffers

Previous Next

Full log

View this message in rfc822 format

From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#6060: closed (24.0.50; Process filters can no longer kill
 buffers)
Date: Thu, 29 Apr 2010 23:13:02 +0000

[Message part 1 (text/plain, inline)]

Your message dated Thu, 29 Apr 2010 18:52:39 -0400
with message-id <jwvzl0loorq.fsf-monnier+emacs <at> gnu.org>
and subject line Re: bug#6060: 24.0.50; Process filters can no longer kill buffers
has caused the GNU bug report #6060,
regarding 24.0.50; Process filters can no longer kill buffers
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


-- 
6060: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=6060
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Helmut Eller <eller.helmut <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.0.50; Process filters can no longer kill buffers
Date: Wed, 28 Apr 2010 16:08:12 +0200

When GNU Emacs 24.0.50.7 (i686-pc-linux-gnu, GTK+ Version 2.12.12) of
2010-04-28 executes code like this:

(defun filter-test ()
  (let* ((proc (start-process 
                "test" nil "/bin/bash" "-c" 
                "for i in 1 2 3 4 ; do echo $i ; sleep 1 ; done"))
         (buffer (generate-new-buffer "test-buffer"))
         (filter (lambda (proc str)
                   (message "filter: %S" str)
                   (kill-buffer buffer))))
    (set-process-filter proc filter)
    (unwind-protect
        (with-current-buffer buffer
          (while (buffer-live-p buffer)
            (accept-process-output proc)))
      (kill-process proc))))

Emacs signals this error:  (error "Selecting deleted buffer")

This used to work in earlier versions of Emacs.
The problem was most likely introduced by:

2010-04-11  Stefan Monnier  <monnier <at> iro.umontreal.ca>

	* process.c (exec_sentinel): Preserve current-buffer.

	* process.c (read_process_output): Move the save-current-buffer to
	apply to both the filter and the non-filter branches.

[Message part 3 (message/rfc822, inline)]

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Helmut Eller <eller.helmut <at> gmail.com>
Subject: Re: bug#6060: 24.0.50; Process filters can no longer kill buffers
Date: Thu, 29 Apr 2010 18:52:39 -0400

> Yes, works. Thanks for the quick fix.

Thanks for confirming,


        Stefan

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.