From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#39962: 27.0.90; Crash in Emacs 27.0.90 Date: Fri, 13 Mar 2020 10:09:00 +0200 Message-ID: <83y2s48yn7.fsf@gnu.org> References: <24162.58107.725366.668639@cochabamba.vanoostrum.org> <329e58b1-6255-311e-bdd8-b6f5b3d5208f@cs.ucla.edu> <22225b66-44f6-d132-3036-92181d53c28d@cs.ucla.edu> <89A83582-358F-43DC-B96E-04EE9D655D5F@vanoostrum.org> <63b88e2d-9888-f3ce-a4b0-fcf344e803e5@cs.ucla.edu> <83d09lbgk5.fsf@gnu.org> Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="54770"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 39962@debbugs.gnu.org, pieter-l@vanoostrum.org, eggert@cs.ucla.edu To: Pip Cet Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri Mar 13 09:09:10 2020 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 1jCfNW-000E6X-QP for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 13 Mar 2020 09:09:10 +0100 Original-Received: from localhost ([::1]:55328 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jCfNV-00053X-SG for geb-bug-gnu-emacs@m.gmane-mx.org; Fri, 13 Mar 2020 04:09:09 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:32902) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jCfNP-00053O-7N for bug-gnu-emacs@gnu.org; Fri, 13 Mar 2020 04:09:04 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jCfNO-0006pw-98 for bug-gnu-emacs@gnu.org; Fri, 13 Mar 2020 04:09:03 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:52102) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1jCfNO-0006p9-5n for bug-gnu-emacs@gnu.org; Fri, 13 Mar 2020 04:09:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1jCfNO-0000r8-0R for bug-gnu-emacs@gnu.org; Fri, 13 Mar 2020 04:09:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 13 Mar 2020 08:09:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 39962 X-GNU-PR-Package: emacs Original-Received: via spool by 39962-submit@debbugs.gnu.org id=B39962.15840869393280 (code B ref 39962); Fri, 13 Mar 2020 08:09:01 +0000 Original-Received: (at 39962) by debbugs.gnu.org; 13 Mar 2020 08:08:59 +0000 Original-Received: from localhost ([127.0.0.1]:58075 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1jCfNL-0000qq-5p for submit@debbugs.gnu.org; Fri, 13 Mar 2020 04:08:59 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:45712) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1jCfNK-0000qZ-0O for 39962@debbugs.gnu.org; Fri, 13 Mar 2020 04:08:58 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:45534) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1jCfND-0006BC-NI; Fri, 13 Mar 2020 04:08:51 -0400 Original-Received: from [176.228.60.248] (port=4178 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1jCfND-00078y-6n; Fri, 13 Mar 2020 04:08:51 -0400 In-Reply-To: (message from Pip Cet on Thu, 12 Mar 2020 20:00:13 +0000) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] 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-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:177249 Archived-At: > From: Pip Cet > Date: Thu, 12 Mar 2020 20:00:13 +0000 > Cc: 39962@debbugs.gnu.org, Paul Eggert > > The first attachment to this message is an Elisp file which does the > same thing, by creating thousands of symbols. On GNU/Linux, with > fairly default standard stack size settings, I get a segfault after > some 85,000 symbols have been created. The default stack size on GNU/Linux is 2MB, right? Maybe it's high time we raised that, what with the memory size today's machines routinely have at their disposal. FWIW, the MS-Windows build have been using a 8MB run-time stack for a very long time. Of course, given enough recursive data structures we can always crash the current GC the way it is implemented. But the question is how many such recursive symbols are there in Pieter's sessions? are they anywhere near the 1000000000 mark you used in your test program? IOW, I think we need to know how close we are in real-life sessions to the dangerous mark. Maybe this is also worth reporting to VM developers. They might consider changing their implementation to avoid these problems. Thanks.