From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Alan Mackenzie Newsgroups: gmane.emacs.bugs Subject: bug#33784: 27.0.50; some case c-backward-token-2 takes cpu more and emacs hang Date: Tue, 18 Dec 2018 18:55:05 +0000 Message-ID: <20181218185505.GC8949__4256.77561802349$1545160448$gmane$org@ACM> References: <20181218174716.96822.qmail@mail.muc.de> <83tvjad5x7.fsf@gnu.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: blaine.gmane.org 1545160448 559 195.159.176.226 (18 Dec 2018 19:14:08 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 18 Dec 2018 19:14:08 +0000 (UTC) User-Agent: Mutt/1.10.1 (2018-07-13) Cc: 33784@debbugs.gnu.org, linux.xhyang@gmail.com To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Dec 18 20:14:03 2018 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1gZKoc-0008SV-IY for geb-bug-gnu-emacs@m.gmane.org; Tue, 18 Dec 2018 20:14:02 +0100 Original-Received: from localhost ([::1]:55952 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gZKqj-0004Sz-8k for geb-bug-gnu-emacs@m.gmane.org; Tue, 18 Dec 2018 14:16:13 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:57826) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gZKqJ-0004Dd-HC for bug-gnu-emacs@gnu.org; Tue, 18 Dec 2018 14:15:54 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gZKd9-00050a-Gf for bug-gnu-emacs@gnu.org; Tue, 18 Dec 2018 14:02:13 -0500 Original-Received: from debbugs.gnu.org ([208.118.235.43]:49451) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1gZKd0-0004Wn-Jq; Tue, 18 Dec 2018 14:02:05 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1gZKcz-0000H6-Pa; Tue, 18 Dec 2018 14:02:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Alan Mackenzie Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org, bug-cc-mode@gnu.org Resent-Date: Tue, 18 Dec 2018 19:02:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 33784 X-GNU-PR-Package: emacs,cc-mode X-GNU-PR-Keywords: Original-Received: via spool by 33784-submit@debbugs.gnu.org id=B33784.15451596771004 (code B ref 33784); Tue, 18 Dec 2018 19:02:01 +0000 Original-Received: (at 33784) by debbugs.gnu.org; 18 Dec 2018 19:01:17 +0000 Original-Received: from localhost ([127.0.0.1]:53709 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1gZKcH-0000G7-3O for submit@debbugs.gnu.org; Tue, 18 Dec 2018 14:01:17 -0500 Original-Received: from colin.muc.de ([193.149.48.1]:17959 helo=mail.muc.de) by debbugs.gnu.org with smtp (Exim 4.84_2) (envelope-from ) id 1gZKcE-0000Fz-Rl for 33784@debbugs.gnu.org; Tue, 18 Dec 2018 14:01:15 -0500 Original-Received: (qmail 30660 invoked by uid 3782); 18 Dec 2018 19:01:13 -0000 Original-Received: from acm.muc.de (p2E5D5B55.dip0.t-ipconnect.de [46.93.91.85]) by colin.muc.de (tmda-ofmipd) with ESMTP; Tue, 18 Dec 2018 20:01:12 +0100 Original-Received: (qmail 12962 invoked by uid 1000); 18 Dec 2018 18:55:05 -0000 Content-Disposition: inline In-Reply-To: <83tvjad5x7.fsf@gnu.org> X-Delivery-Agent: TMDA/1.1.12 (Macallan) X-Primary-Address: acm@muc.de X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 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" Xref: news.gmane.org gmane.emacs.bugs:153567 Archived-At: Hello, Eli. On Tue, Dec 18, 2018 at 20:51:48 +0200, Eli Zaretskii wrote: > > Date: 18 Dec 2018 17:47:16 -0000 > > From: Alan Mackenzie > > Cc: 33784@debbugs.gnu.org > > Incidentally, the temporary buffer created by with-temp-buffer never has > > font-lock-mode enabled, and font-lock-mode is spiked so that it cannot > > be enabled in such a buffer. I don't know why. Attempting to enable it > > fails silently, which is probably another bug. > It's not a bug, since the temporary buffer starts in Fundamental mode. If fails silently even after M-: c++-mode in that buffer. The current strategy is silently to ignore (font-lock-mode) when the buffer name begins with a space. It feels to me like an easy to implement, but suboptimal, workaround to a real problem, whatever that real problem might be. -- Alan Mackenzie (Nuremberg, Germany).