From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Lennart Borgman (gmail)" Newsgroups: gmane.emacs.devel Subject: Re: CC mode 5.31.4: c-{beginning, end}-of-defun try to modify buffer Date: Tue, 08 Jan 2008 21:14:25 +0100 Message-ID: <4783D9A1.7070503@gmail.com> References: <20080108200301.GA2238@muc.de> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1199823293 4146 80.91.229.12 (8 Jan 2008 20:14:53 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 8 Jan 2008 20:14:53 +0000 (UTC) Cc: Andreas Schwab , emacs-devel@gnu.org To: bug-cc-mode@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Jan 08 21:15:13 2008 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1JCKqv-0002TE-3M for ged-emacs-devel@m.gmane.org; Tue, 08 Jan 2008 21:15:13 +0100 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1JCKqX-0005oe-Tj for ged-emacs-devel@m.gmane.org; Tue, 08 Jan 2008 15:14:49 -0500 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1JCKqU-0005oX-QU for emacs-devel@gnu.org; Tue, 08 Jan 2008 15:14:46 -0500 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1JCKqS-0005nz-Bw for emacs-devel@gnu.org; Tue, 08 Jan 2008 15:14:46 -0500 Original-Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1JCKqS-0005nw-8O for emacs-devel@gnu.org; Tue, 08 Jan 2008 15:14:44 -0500 Original-Received: from ch-smtp01.sth.basefarm.net ([80.76.149.212]) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1JCKqO-0003qt-HW; Tue, 08 Jan 2008 15:14:40 -0500 Original-Received: from c83-254-148-228.bredband.comhem.se ([83.254.148.228]:60581 helo=[127.0.0.1]) by ch-smtp01.sth.basefarm.net with esmtp (Exim 4.68) (envelope-from ) id 1JCKqM-00078T-62; Tue, 08 Jan 2008 21:14:39 +0100 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.9) Gecko/20071031 Thunderbird/2.0.0.9 Mnenhy/0.7.5.666 In-Reply-To: <20080108200301.GA2238@muc.de> X-Antivirus: avast! (VPS 080108-0, 2008-01-08), Outbound message X-Antivirus-Status: Clean X-Originating-IP: 83.254.148.228 X-Scan-Result: No virus found in message 1JCKqM-00078T-62. X-Scan-Signature: ch-smtp01.sth.basefarm.net 1JCKqM-00078T-62 bbe929ae91cd705b583b05ee144b2205 X-detected-kernel: by monty-python.gnu.org: Linux 2.6? (barebone, rare!) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:86584 Archived-At: Alan Mackenzie wrote: > Hi, Andreas! > > On Tue, Jan 08, 2008 at 06:13:40PM +0100, Andreas Schwab wrote: >> c-{beginning,end}-of-defun try to modify the buffer and thus trigger >> ask-user-about-supersession-threat. To reproduce load a C file and >> touch the underlying file. Then type C-M-e repeatedly. After some >> tries you will be asked whether you want to edit the buffer. > > Ouch! > > Yes, I can reproduce this. At a guess, it's happening because of CC > Mode's extensive use of text properties. I don't (yet) see why it only > happens after a several C-M-e's rather than the first. Applying text > properties counts as modifying the buffer (I think this is a Bad Thing), > and the primitive function which applies the text properties seems to be > checking for the file having been modified. Or something like that. Are you talking about the text properties that font lock applies? I believe those does not mark the buffer as modified.