From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.bugs Subject: bug#9159: 24.0.50; `undo' is not as good as it should be wrt property changes Date: Tue, 02 Aug 2011 00:16:15 -0400 Message-ID: References: <2770D343D58A43A6A97AC158A2C6B677@us.oracle.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: dough.gmane.org 1312258606 10602 80.91.229.12 (2 Aug 2011 04:16:46 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Tue, 2 Aug 2011 04:16:46 +0000 (UTC) Cc: 9159@debbugs.gnu.org To: "Drew Adams" Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Aug 02 06:16:42 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 1Qo6PI-0002vu-Vd for geb-bug-gnu-emacs@m.gmane.org; Tue, 02 Aug 2011 06:16:41 +0200 Original-Received: from localhost ([::1]:37915 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Qo6PI-0000vi-1r for geb-bug-gnu-emacs@m.gmane.org; Tue, 02 Aug 2011 00:16:40 -0400 Original-Received: from eggs.gnu.org ([140.186.70.92]:44252) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Qo6PF-0000vR-4b for bug-gnu-emacs@gnu.org; Tue, 02 Aug 2011 00:16:38 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Qo6PE-00078r-3J for bug-gnu-emacs@gnu.org; Tue, 02 Aug 2011 00:16:37 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:43961) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Qo6PE-00078l-1o for bug-gnu-emacs@gnu.org; Tue, 02 Aug 2011 00:16:36 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.69) (envelope-from ) id 1Qo6Pd-0000lL-IJ; Tue, 02 Aug 2011 00:17:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier 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 04:17:01 +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=B9159.13122586042893 (code B ref 9159); Tue, 02 Aug 2011 04:17:01 +0000 Original-Received: (at 9159) by debbugs.gnu.org; 2 Aug 2011 04:16:44 +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 1Qo6PL-0000ka-U1 for submit@debbugs.gnu.org; Tue, 02 Aug 2011 00:16:44 -0400 Original-Received: from ironport2-out.teksavvy.com ([206.248.154.183] helo=ironport2-out.pppoe.ca) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1Qo6PK-0000kR-Ih; Tue, 02 Aug 2011 00:16:43 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Av0EAJx5N05FxKfe/2dsb2JhbABCp194gUABAQQBViMFCws0EhQYDSSHf8EUhkIEn0qEMQ X-IronPort-AV: E=Sophos;i="4.67,305,1309752000"; d="scan'208";a="128374583" Original-Received: from 69-196-167-222.dsl.teksavvy.com (HELO ceviche.home) ([69.196.167.222]) by ironport2-out.pppoe.ca with ESMTP/TLS/ADH-AES256-SHA; 02 Aug 2011 00:16:16 -0400 Original-Received: by ceviche.home (Postfix, from userid 20848) id EF3CB660CF; Tue, 2 Aug 2011 00:16:15 -0400 (EDT) In-Reply-To: <2770D343D58A43A6A97AC158A2C6B677@us.oracle.com> (Drew Adams's message of "Sat, 23 Jul 2011 19:06:39 -0700") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list Resent-Date: Tue, 02 Aug 2011 00:17:01 -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:49789 Archived-At: severity 9159 minor thanks > 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? Usually we handle the absence of a text property as synonym to a nil value of that property. Stefan