From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Drew Adams" Newsgroups: gmane.emacs.bugs Subject: bug#9159: 24.0.50; `undo' is not as good as it should be wrt property changes Date: Tue, 2 Aug 2011 10:34:19 -0700 Message-ID: <7FC41925A39D4B16A7F1CB3CCF4A4371@us.oracle.com> References: <2770D343D58A43A6A97AC158A2C6B677@us.oracle.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Trace: dough.gmane.org 1312306482 2640 80.91.229.12 (2 Aug 2011 17:34:42 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Tue, 2 Aug 2011 17:34:42 +0000 (UTC) Cc: 9159@debbugs.gnu.org To: "'Stefan Monnier'" Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Aug 02 19:34:38 2011 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([140.186.70.17]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1QoIrW-0005tp-EJ for geb-bug-gnu-emacs@m.gmane.org; Tue, 02 Aug 2011 19:34:38 +0200 Original-Received: from localhost ([::1]:49674 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QoIrV-0008CO-V7 for geb-bug-gnu-emacs@m.gmane.org; Tue, 02 Aug 2011 13:34:37 -0400 Original-Received: from eggs.gnu.org ([140.186.70.92]:32848) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QoIrT-0008CJ-Va for bug-gnu-emacs@gnu.org; Tue, 02 Aug 2011 13:34:36 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QoIrR-0000Ze-NV for bug-gnu-emacs@gnu.org; Tue, 02 Aug 2011 13:34:35 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:40897) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QoIrR-0000ZW-Ly for bug-gnu-emacs@gnu.org; Tue, 02 Aug 2011 13:34:33 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.69) (envelope-from ) id 1QoIru-0005oU-2b; Tue, 02 Aug 2011 13:35:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: "Drew Adams" Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-To: owner@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 02 Aug 2011 17:35:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 9159 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 9159-submit@debbugs.gnu.org id=B9159.131230650022336 (code B ref 9159); Tue, 02 Aug 2011 17:35:02 +0000 Original-Received: (at 9159) by debbugs.gnu.org; 2 Aug 2011 17:35:00 +0000 Original-Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1QoIrr-0005oD-Sh for submit@debbugs.gnu.org; Tue, 02 Aug 2011 13:35:00 -0400 Original-Received: from rcsinet15.oracle.com ([148.87.113.117]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1QoIrp-0005o6-Oo for 9159@debbugs.gnu.org; Tue, 02 Aug 2011 13:34:58 -0400 Original-Received: from acsinet22.oracle.com (acsinet22.oracle.com [141.146.126.238]) by rcsinet15.oracle.com (Switch-3.4.4/Switch-3.4.4) with ESMTP id p72HYQlA022994 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Tue, 2 Aug 2011 17:34:28 GMT Original-Received: from acsmt358.oracle.com (acsmt358.oracle.com [141.146.40.158]) by acsinet22.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id p72HYPkG026379 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 2 Aug 2011 17:34:26 GMT Original-Received: from abhmt113.oracle.com (abhmt113.oracle.com [141.146.116.65]) by acsmt358.oracle.com (8.12.11.20060308/8.12.11) with ESMTP id p72HYJSn009919; Tue, 2 Aug 2011 12:34:20 -0500 Original-Received: from dradamslap1 (/130.35.178.194) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 02 Aug 2011 10:34:19 -0700 X-Mailer: Microsoft Office Outlook 11 In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6109 Thread-Index: AcxQyvDFlEKmK+vMS/yeMR4lx20a1wAal2NA X-Source-IP: acsinet22.oracle.com [141.146.126.238] X-Auth-Type: Internal IP X-CT-RefId: str=0001.0A090208.4E383524.006D:SCFMA922111,ss=1,re=-4.000,fgs=0 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list Resent-Date: Tue, 02 Aug 2011 13:35:02 -0400 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 1) X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:49813 Archived-At: > > C-M-_ to undo the last change. > > With point in the same place, do `C-u C-x ='. > > That shows that there is property `foo' there, with value nil. > > Do you have an example situation where the difference matters? What does "matters" mean? Evidently it does not matter much to you. > Usually we handle the absence of a text property as synonym to a nil > value of that property. Yes, I know that. And this is a good example where it makes a difference. How much it "matters" to you, you can decide.