From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#46586: 26.3, 27.1.50; Emacs crash in a backtrace (core) dump (a long standing issue) Date: Thu, 18 Feb 2021 17:00:50 +0200 Message-ID: <838s7l5skd.fsf@gnu.org> References: <83im6q7ka2.fsf@gnu.org> <83k0r55umg.fsf@gnu.org> <874ki9zb82.fsf@igel.home> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="15575"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 46586@debbugs.gnu.org, luke.yx.lee@gmail.com, monnier@iro.umontreal.ca To: Andreas Schwab Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu Feb 18 16:02:35 2021 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lCkp8-0003wp-Is for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 18 Feb 2021 16:02:34 +0100 Original-Received: from localhost ([::1]:58064 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lCkp7-00072F-K2 for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 18 Feb 2021 10:02:33 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:35814) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lCkne-0006aM-8s for bug-gnu-emacs@gnu.org; Thu, 18 Feb 2021 10:01:02 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:36144) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lCknd-0001Wu-WF for bug-gnu-emacs@gnu.org; Thu, 18 Feb 2021 10:01:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1lCknd-0000eP-UF for bug-gnu-emacs@gnu.org; Thu, 18 Feb 2021 10:01:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 18 Feb 2021 15:01:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 46586 X-GNU-PR-Package: emacs Original-Received: via spool by 46586-submit@debbugs.gnu.org id=B46586.16136604522479 (code B ref 46586); Thu, 18 Feb 2021 15:01:01 +0000 Original-Received: (at 46586) by debbugs.gnu.org; 18 Feb 2021 15:00:52 +0000 Original-Received: from localhost ([127.0.0.1]:47690 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lCknT-0000du-Q6 for submit@debbugs.gnu.org; Thu, 18 Feb 2021 10:00:52 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:46092) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lCknR-0000dh-Ok for 46586@debbugs.gnu.org; Thu, 18 Feb 2021 10:00:50 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:42924) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lCknI-0001JD-FV; Thu, 18 Feb 2021 10:00:42 -0500 Original-Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:2465 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1lCknH-0002kl-MI; Thu, 18 Feb 2021 10:00:40 -0500 In-Reply-To: <874ki9zb82.fsf@igel.home> (message from Andreas Schwab on Thu, 18 Feb 2021 15:45:01 +0100) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:200265 Archived-At: > From: Andreas Schwab > Cc: 路客 , 46586@debbugs.gnu.org, > Stefan Monnier > > Date: Thu, 18 Feb 2021 15:45:01 +0100 > > On Feb 18 2021, Eli Zaretskii wrote: > > > Does anyone see how to stop this infinite recursion, except by > > counting recursive invocation levels and bailing out at some arbitrary > > depth? > > Shouldn't the subst->seen list prevent recursion? Maybe, but the insertion into the 'seen' list is conditioned on #n= being in 'completed'. Or maybe I don't understand the logic of the code well enough.