GNU bug report logs - #33533
26.1; set-window-configuration does not restore display start

Please note: This is a static page, with minimal formatting, updated once a day.
Click here to see this page with the latest information and nicer formatting.

Package: emacs; Reported by: Markus Triska <triska@HIDDEN>; merged with #33532; dated Tue, 27 Nov 2018 22:17:02 UTC; Maintainer for emacs is bug-gnu-emacs@HIDDEN.
Merged 33532 33533. Request was from Glenn Morris <rgm@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

Message received at submit <at> debbugs.gnu.org:


Received: (at submit) by debbugs.gnu.org; 27 Nov 2018 22:16:48 +0000
From debbugs-submit-bounces <at> debbugs.gnu.org Tue Nov 27 17:16:48 2018
Received: from localhost ([127.0.0.1]:52583 helo=debbugs.gnu.org)
	by debbugs.gnu.org with esmtp (Exim 4.84_2)
	(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
	id 1gRley-0007k6-3R
	for submit <at> debbugs.gnu.org; Tue, 27 Nov 2018 17:16:48 -0500
Received: from eggs.gnu.org ([208.118.235.92]:51175)
 by debbugs.gnu.org with esmtp (Exim 4.84_2)
 (envelope-from <triska@HIDDEN>) id 1gRlew-0007jt-84
 for submit <at> debbugs.gnu.org; Tue, 27 Nov 2018 17:16:46 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
 (envelope-from <triska@HIDDEN>) id 1gRlep-0001hZ-Ud
 for submit <at> debbugs.gnu.org; Tue, 27 Nov 2018 17:16:40 -0500
X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=disabled
 version=3.3.2
Received: from lists.gnu.org ([2001:4830:134:3::11]:54591)
 by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32)
 (Exim 4.71) (envelope-from <triska@HIDDEN>) id 1gRleo-0001gz-UD
 for submit <at> debbugs.gnu.org; Tue, 27 Nov 2018 17:16:39 -0500
Received: from eggs.gnu.org ([2001:4830:134:3::10]:60764)
 by lists.gnu.org with esmtp (Exim 4.71)
 (envelope-from <triska@HIDDEN>) id 1gRlen-0007Oi-Vu
 for bug-gnu-emacs@HIDDEN; Tue, 27 Nov 2018 17:16:38 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
 (envelope-from <triska@HIDDEN>) id 1gRlei-0001dj-HE
 for bug-gnu-emacs@HIDDEN; Tue, 27 Nov 2018 17:16:37 -0500
Received: from metalevel.at ([78.46.218.83]:50694)
 by eggs.gnu.org with esmtp (Exim 4.71)
 (envelope-from <triska@HIDDEN>) id 1gRlei-0001dS-6F
 for bug-gnu-emacs@HIDDEN; Tue, 27 Nov 2018 17:16:32 -0500
Received: from debian (localhost.localdomain [127.0.0.1])
 by metalevel.at (Postfix) with ESMTP id 04B86A2AFD
 for <bug-gnu-emacs@HIDDEN>; Tue, 27 Nov 2018 23:16:31 +0100 (CET)
Received: by debian (Postfix, from userid 1000)
 id DB2C9E1396; Tue, 27 Nov 2018 23:05:09 +0100 (CET)
From: Markus Triska <triska@HIDDEN>
To: bug-gnu-emacs@HIDDEN
Subject: 26.1; set-window-configuration does not restore display start
Date: Tue, 27 Nov 2018 23:05:09 +0100
Message-ID: <87h8g22n3e.fsf@HIDDEN>
MIME-Version: 1.0
Content-Type: text/plain
X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic]
 [fuzzy]
X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x
X-Received-From: 2001:4830:134:3::11
X-Spam-Score: -5.0 (-----)
X-Debbugs-Envelope-To: submit
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.18
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, 
 <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
X-Spam-Score: -6.0 (------)


In "emacs -Q", please evaluate the following form:

    (let ((buf (get-buffer-create "buf")))
      (switch-to-buffer buf)
      (erase-buffer)
      (dotimes (x 10)
        (insert (format "x is %s\n" x)))
      (recenter 3)
      (sit-for 1)
      (let ((conf (current-window-configuration))
            (ws (window-start))
            (str (with-current-buffer buf (buffer-string))))
        (with-current-buffer buf
          (erase-buffer)
          (insert str))
        (set-window-configuration conf)
        (sit-for 1)
        (message "window-start: %s vs. %s" ws (window-start))))

This shows that after set-window-configuration, even though the buffer
content is the same as at the time the configuration was obtained, the
value of (window-start) differs from before: After the window
configuration is set, (window-start) is 1. I expect it to be 50 (i.e.,
the value at the time the configuration was obtained), because the
documentation of current-window-configuration states:

    This describes ... for each ... buffer, where display starts ...

If possible, could you please consider restoring window-start to the
exact same position? Thank you very much!

In GNU Emacs 26.1 (build 1, x86_64-pc-linux-gnu, X toolkit, Xaw scroll bars)
 of 2018-11-18 built on debian
Repository revision: 07f8f9bc5a51f5aa94eb099f3e15fbe0c20ea1ea
Windowing system distributor 'The X.Org Foundation', version 11.0.11902000
System Description:	Debian GNU/Linux 9.6 (stretch)





Acknowledgement sent to Markus Triska <triska@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs@HIDDEN. Full text available.
Report forwarded to bug-gnu-emacs@HIDDEN:
bug#33533; Package emacs. Full text available.
Please note: This is a static page, with minimal formatting, updated once a day.
Click here to see this page with the latest information and nicer formatting.
Last modified: Wed, 28 Nov 2018 01:00:02 UTC

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