From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Chong Yidong Newsgroups: gmane.emacs.bugs Subject: bug#4209: 23.1; Emacs 23.1 regression in re-search-forward Date: Wed, 27 Jan 2010 11:43:30 -0500 Message-ID: <87zl3z4hxp.fsf@stupidchicken.com> References: <87ljfkha9i.fsf@stupidchicken.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1264612730 4104 80.91.229.12 (27 Jan 2010 17:18:50 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 27 Jan 2010 17:18:50 +0000 (UTC) Cc: 4209@debbugs.gnu.org To: Stefan Monnier Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Wed Jan 27 18:18:47 2010 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1NaBXE-0000VG-B4 for geb-bug-gnu-emacs@m.gmane.org; Wed, 27 Jan 2010 18:18:32 +0100 Original-Received: from localhost ([127.0.0.1]:43615 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NaBXD-0000tq-H9 for geb-bug-gnu-emacs@m.gmane.org; Wed, 27 Jan 2010 12:18:31 -0500 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1NaBOx-0001cI-Ul for bug-gnu-emacs@gnu.org; Wed, 27 Jan 2010 12:09:59 -0500 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1NaBOt-0001XZ-2w for bug-gnu-emacs@gnu.org; Wed, 27 Jan 2010 12:09:59 -0500 Original-Received: from [199.232.76.173] (port=53790 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NaBOs-0001XF-RJ for bug-gnu-emacs@gnu.org; Wed, 27 Jan 2010 12:09:54 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:54042) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1NaBOs-0006cL-Fq for bug-gnu-emacs@gnu.org; Wed, 27 Jan 2010 12:09:54 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.69) (envelope-from ) id 1NaAzq-0004L9-3W; Wed, 27 Jan 2010 11:44:02 -0500 X-Loop: bug-gnu-emacs@gnu.org Resent-From: Chong Yidong Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-To: owner@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 27 Jan 2010 16:44:02 +0000 Resent-Message-ID: Resent-Sender: bug-gnu-emacs@gnu.org X-Emacs-PR-Message: followup 4209 X-Emacs-PR-Package: emacs X-Emacs-PR-Keywords: Original-Received: via spool by 4209-submit@debbugs.gnu.org id=B4209.126461062016671 (code B ref 4209); Wed, 27 Jan 2010 16:44:02 +0000 Original-Received: (at 4209) by debbugs.gnu.org; 27 Jan 2010 16:43:40 +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 1NaAzT-0004Kq-3I for submit@debbugs.gnu.org; Wed, 27 Jan 2010 11:43:39 -0500 Original-Received: from pantheon-po34.its.yale.edu ([130.132.50.80]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1NaAzQ-0004Kg-Lz for 4209@debbugs.gnu.org; Wed, 27 Jan 2010 11:43:37 -0500 Original-Received: from furry (dhcp128036014123.central.yale.edu [128.36.14.123]) (authenticated bits=0) by pantheon-po34.its.yale.edu (8.12.11.20060308/8.12.11) with ESMTP id o0RGhVW7010523 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Wed, 27 Jan 2010 11:43:31 -0500 Original-Received: by furry (Postfix, from userid 1000) id 8990FC05D; Wed, 27 Jan 2010 09:43:30 -0700 (MST) In-Reply-To: (Stefan Monnier's message of "Wed, 27 Jan 2010 09:34:38 -0500") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1.91 (gnu/linux) X-YaleITSMailFilter: Version 1.2c (attachment(s) not renamed) X-Spam-Score: -2.9 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list X-Spam-Score: -2.9 (--) Resent-Date: Wed, 27 Jan 2010 11:44:02 -0500 X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6 (newer, 3) 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: , Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:34757 Archived-At: Stefan Monnier writes: > The preceding comment keeps me puzzled. I thought that we only ever > matched re_patterns and buffers of the same multibyteness, i.e. if > a unibyte regexp is matched against a multibyte buffer it should first > be turned into a multibyte regexp and then re_compiled, so the case of: > > /* For the case of matching this unibyte regex > against multibyte, we must set a leading code of > the corresponding multibyte character. */ > > should never happen in analyse_first. Yet, if your patch fixes the bug, > that indicates that apparently it *does* happen. I observe that in the original bug recipe: (set-buffer (get-buffer-create "*Test Buffer*")) (insert "\xC2\x4C\xEF\x77\xC6\x69\x8C\x0A") (goto-char (point-min)) (message "looking-at: %s" (looking-at "\\`\xC2\x4C\xEF\x77\xC6\x69\x8C\x0A")) (message "re-search-forward: %s" (re-search-forward "\\`\xC2\x4C\xEF\x77\xC6\x69\x8C\x0A" 100 t)) If we replace (re-search-forward "\\`\xC2\x4C\xEF\x77\xC6\x69\x8C\x0A" 100 t)) with (re-search-forward (string-to-multibyte "\\`\xC2\x4C\xEF\x77\xC6\x69\x8C\x0A") 100 t)) then the regexp match takes places correctly. I'm not sure why the looking-at call works, tho.