From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.bugs Subject: bug#34910: 27.0.50; Too much matching reentrancy Date: Sat, 30 Mar 2019 08:55:31 -0400 Message-ID: References: <834l7zuw4x.fsf@gnu.org> <443195D9-DFEB-4E67-AEFE-556C3D900113@acm.org> <8336njuqrd.fsf@gnu.org> <66172e4bc6e70e23d7bf3175a5c83519a43c1a66.camel@acm.org> <83sgv4iu9d.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="146860"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) Cc: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= , 34910@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Mar 30 13:56:22 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hADX4-000c6s-Bb for geb-bug-gnu-emacs@m.gmane.org; Sat, 30 Mar 2019 13:56:22 +0100 Original-Received: from localhost ([127.0.0.1]:48940 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hADX3-00061L-1A for geb-bug-gnu-emacs@m.gmane.org; Sat, 30 Mar 2019 08:56:21 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:37115) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hADWv-00061E-Sk for bug-gnu-emacs@gnu.org; Sat, 30 Mar 2019 08:56:14 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hADWs-0005gX-0e for bug-gnu-emacs@gnu.org; Sat, 30 Mar 2019 08:56:11 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:51012) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1hADWk-0005d5-R6 for bug-gnu-emacs@gnu.org; Sat, 30 Mar 2019 08:56:05 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1hADWk-0000Qp-Fl for bug-gnu-emacs@gnu.org; Sat, 30 Mar 2019 08:56:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 30 Mar 2019 12:56:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 34910 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: patch Original-Received: via spool by 34910-submit@debbugs.gnu.org id=B34910.15539505551645 (code B ref 34910); Sat, 30 Mar 2019 12:56:02 +0000 Original-Received: (at 34910) by debbugs.gnu.org; 30 Mar 2019 12:55:55 +0000 Original-Received: from localhost ([127.0.0.1]:36323 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hADWc-0000QS-HY for submit@debbugs.gnu.org; Sat, 30 Mar 2019 08:55:54 -0400 Original-Received: from pruche.dit.umontreal.ca ([132.204.246.22]:53014) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hADWa-0000QK-Cc for 34910@debbugs.gnu.org; Sat, 30 Mar 2019 08:55:53 -0400 Original-Received: from pastel.home (lechon.iro.umontreal.ca [132.204.27.242]) by pruche.dit.umontreal.ca (8.14.7/8.14.1) with ESMTP id x2UCtVp1009636; Sat, 30 Mar 2019 08:55:31 -0400 Original-Received: by pastel.home (Postfix, from userid 20848) id 6C3CD6AD7C; Sat, 30 Mar 2019 08:55:31 -0400 (EDT) In-Reply-To: <83sgv4iu9d.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 30 Mar 2019 12:30:54 +0300") X-NAI-Spam-Flag: NO X-NAI-Spam-Threshold: 5 X-NAI-Spam-Score: 0 X-NAI-Spam-Rules: 2 Rules triggered EDT_SA_DN_PASS=0, RV6514=0 X-NAI-Spam-Version: 2.3.0.9418 : core <6514> : inlines <7045> : streams <1817207> : uri <2822608> 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: 209.51.188.43 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:156944 Archived-At: >> By the way, is there any reason why only calls to re_search_2 are made >> with a busy-marked regexp buffer, not calls to re_search? Are the >> latter guaranteed not to be reentrant? > Not sure. Stefan, any thoughts? It was probably just an oversight, because whether we're searching within strings or within buffers the same problems appear with \{N\} repetitions (where the counter is stored directly inside the regexp-byte-code) and with on-the-fly strength-reduction (where we replace some byte-code with cheaper ones (where applicable) on the first pass through the regexp). Stefan