From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#38748: 28.0.50; crash on MacOS 10.15.2 Date: Thu, 09 Jan 2020 05:30:58 +0200 Message-ID: <83sgkp9uh9.fsf@gnu.org> References: <20191226130420.GB71460@breton.holly.idiocy.org> <83fth7qa3a.fsf@gnu.org> <83blrtq2j0.fsf@gnu.org> <83sgl3lyii.fsf@gnu.org> <834kxej6lc.fsf@gnu.org> <8336cpbtzh.fsf@gnu.org> Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="121811"; mail-complaints-to="usenet@blaine.gmane.org" Cc: rpluim@gmail.com, 38748@debbugs.gnu.org, alan@idiocy.org, andreyk.mad@gmail.com, jguenther@gmail.com To: Pip Cet Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu Jan 09 04:33:59 2020 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1ipOXU-000r5Z-O2 for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 09 Jan 2020 04:31:16 +0100 Original-Received: from localhost ([::1]:54788 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ipOXT-0002YT-2J for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 08 Jan 2020 22:31:15 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:33966) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ipOXI-0002YC-F3 for bug-gnu-emacs@gnu.org; Wed, 08 Jan 2020 22:31:07 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ipOXG-0006Ff-OR for bug-gnu-emacs@gnu.org; Wed, 08 Jan 2020 22:31:04 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:45721) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1ipOXG-0006FI-J5 for bug-gnu-emacs@gnu.org; Wed, 08 Jan 2020 22:31:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1ipOXG-0003Bt-G6 for bug-gnu-emacs@gnu.org; Wed, 08 Jan 2020 22:31:02 -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, 09 Jan 2020 03:31:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 38748 X-GNU-PR-Package: emacs Original-Received: via spool by 38748-submit@debbugs.gnu.org id=B38748.157854065212249 (code B ref 38748); Thu, 09 Jan 2020 03:31:02 +0000 Original-Received: (at 38748) by debbugs.gnu.org; 9 Jan 2020 03:30:52 +0000 Original-Received: from localhost ([127.0.0.1]:51694 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ipOX6-0003BU-79 for submit@debbugs.gnu.org; Wed, 08 Jan 2020 22:30:52 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:51082) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ipOX5-0003BF-Bb for 38748@debbugs.gnu.org; Wed, 08 Jan 2020 22:30:51 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:50328) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ipOWw-0005o3-PC; Wed, 08 Jan 2020 22:30:43 -0500 Original-Received: from [176.228.60.248] (port=3610 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1ipOWw-0006MC-3w; Wed, 08 Jan 2020 22:30:42 -0500 In-reply-to: (message from Pip Cet on Wed, 8 Jan 2020 20:39:43 +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.org gmane.emacs.bugs:174393 Archived-At: > From: Pip Cet > Date: Wed, 8 Jan 2020 20:39:43 +0000 > Cc: rpluim@gmail.com, alan@idiocy.org, jguenther@gmail.com, > andreyk.mad@gmail.com, 38748@debbugs.gnu.org > > > No, GC is known to take many thousands of recursive calls to > > mark_object. 9000 is not a particularly high number, and doesn't > > necessarily signal infinite recursion. > > In general, you're absolutely correct. But in this case, it still > sounds very likely: infinite recursion of a properly tail-recursive > function would loop rather than cause a stack overflow, which would > explain everything, except for why it's not actually an infinite loop; > I suspect the macOS code somewhere does modify things asynchronously. The backtrace shows a very recursive GC, it doesn't show any other function being deeply recursive. So I'm not sure I understand what tail-recursive function did you have in mind. Can you elaborate?