From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Alan Mackenzie Newsgroups: gmane.emacs.devel Subject: Re: Edebug corrupting point in buffers. Date: Tue, 1 Nov 2022 17:24:26 +0000 Message-ID: References: <83wn8fcgvd.fsf@gnu.org> <83iljydh7e.fsf@gnu.org> <838rkud9d5.fsf@gnu.org> <83v8nybnuk.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="24540"; mail-complaints-to="usenet@ciao.gmane.io" Cc: emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Nov 01 18:30:22 2022 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1opv5i-00067f-0A for ged-emacs-devel@m.gmane-mx.org; Tue, 01 Nov 2022 18:30:22 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1opv06-0005fT-Qo; Tue, 01 Nov 2022 13:24:34 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1opv04-0005UL-E7 for emacs-devel@gnu.org; Tue, 01 Nov 2022 13:24:32 -0400 Original-Received: from mx3.muc.de ([193.149.48.5]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1opv02-0001EC-TE for emacs-devel@gnu.org; Tue, 01 Nov 2022 13:24:32 -0400 Original-Received: (qmail 65466 invoked by uid 3782); 1 Nov 2022 18:24:27 +0100 Original-Received: from acm.muc.de (p4fe15c46.dip0.t-ipconnect.de [79.225.92.70]) (using STARTTLS) by colin.muc.de (tmda-ofmipd) with ESMTP; Tue, 01 Nov 2022 18:24:27 +0100 Original-Received: (qmail 7856 invoked by uid 1000); 1 Nov 2022 17:24:26 -0000 Content-Disposition: inline In-Reply-To: <83v8nybnuk.fsf@gnu.org> X-Submission-Agent: TMDA/1.3.x (Ph3nix) X-Primary-Address: acm@muc.de Received-SPF: pass client-ip=193.149.48.5; envelope-from=acm@muc.de; helo=mx3.muc.de X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: "Emacs-devel" Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:298961 Archived-At: Hello, Eli. On Tue, Nov 01, 2022 at 19:12:35 +0200, Eli Zaretskii wrote: > > Date: Tue, 1 Nov 2022 17:06:38 +0000 > > Cc: emacs-devel@gnu.org > > From: Alan Mackenzie > > > If the problem happens only when edebug-save-displayed-buffer-points > > > is non-nil, then maybe we should step back a notch and ask why you set > > > that option? It is nil by default. > > It is t by default, and has been since Richard S. created or amended the > > declaration in 1997. > It isn't here: > (defcustom edebug-save-displayed-buffer-points nil > "If non-nil, save and restore point in all displayed buffers. > What am I missing? The troublesome behaviour is controlled by edebug-save-windows, not edebug-save-displayed-buffer-points. edebug-save-windows is enabled by default. Sorry for not reading your post more carefully. > > Might you have customised it to nil in your own configuration? > No. OK. Then I think we now agree that edebug-save-windows is t by default, this is the variable toggled by the W key sequence, and it is the variable which causes the undesired corruption of point when stepping through test-edebug.el. I don't know why edebug-save-windows is t by default. In the meantime, the bug I have reported is real, even if it only triggers occasionally. -- Alan Mackenzie (Nuremberg, Germany).