From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: [Emacs-diffs] master fd8f724: * src/xdisp.c (overlay_arrows_changed_p): Fix last change. Date: Tue, 28 Feb 2017 21:11:30 +0200 Message-ID: <83r32inna5.fsf@gnu.org> References: <83y3wqnvol.fsf@gnu.org> <83tw7enq58.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1488309366 16404 195.159.176.226 (28 Feb 2017 19:16:06 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 28 Feb 2017 19:16:06 +0000 (UTC) Cc: emacs-devel@gnu.org To: Stefan Monnier Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Feb 28 20:16:00 2017 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cinFd-0003O6-Qm for ged-emacs-devel@m.gmane.org; Tue, 28 Feb 2017 20:15:57 +0100 Original-Received: from localhost ([::1]:36353 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cinFi-0001Cp-3W for ged-emacs-devel@m.gmane.org; Tue, 28 Feb 2017 14:16:02 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:47201) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cinBn-0005tH-Sq for emacs-devel@gnu.org; Tue, 28 Feb 2017 14:12:00 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cinBi-0000c5-Vl for emacs-devel@gnu.org; Tue, 28 Feb 2017 14:11:59 -0500 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:52136) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cinBi-0000bz-Sj; Tue, 28 Feb 2017 14:11:54 -0500 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:4450 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1cinBi-0000Jz-6x; Tue, 28 Feb 2017 14:11:54 -0500 In-reply-to: (message from Stefan Monnier on Tue, 28 Feb 2017 13:58:04 -0500) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:4830:134:3::e X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:212660 Archived-At: > From: Stefan Monnier > Date: Tue, 28 Feb 2017 13:58:04 -0500 > > We have a list of variables, and we store the last position of the > marker held in that variable in a symbol property. > > If that variable is buffer-local, then that same variable can contain > several markers (upto one per buffer) yet it only has a single property > to keep the old value, that needs to be shared by all those > markers/buffers. But we only care what happens with these between two successive redisplay cycles. What kind of scenario could possibly change that variable in more than one buffer?