From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#29066: 26.0.90; crash in gc involving buffer local symbols Date: Tue, 31 Oct 2017 23:08:58 +0200 Message-ID: <83lgjrrpn9.fsf@gnu.org> References: <83a808tlqp.fsf@gnu.org> <838tfst27n.fsf@gnu.org> <87efpjzv2p.fsf@linux-m68k.org> <834lqfta80.fsf@gnu.org> <877evbxe1e.fsf@linux-m68k.org> <83r2tjrr92.fsf@gnu.org> <87375zxc69.fsf@linux-m68k.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1509484225 11692 195.159.176.226 (31 Oct 2017 21:10:25 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 31 Oct 2017 21:10:25 +0000 (UTC) Cc: 29066@debbugs.gnu.org, vgatien-baron@janestreet.com, mshinwell@janestreet.com To: Andreas Schwab Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Oct 31 22:10:18 2017 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1e9dnb-0001ya-Dd for geb-bug-gnu-emacs@m.gmane.org; Tue, 31 Oct 2017 22:10:15 +0100 Original-Received: from localhost ([::1]:47410 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e9dni-0002PN-Q8 for geb-bug-gnu-emacs@m.gmane.org; Tue, 31 Oct 2017 17:10:22 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:37720) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e9dnR-0002Dl-83 for bug-gnu-emacs@gnu.org; Tue, 31 Oct 2017 17:10:06 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1e9dnO-0004H2-2U for bug-gnu-emacs@gnu.org; Tue, 31 Oct 2017 17:10:05 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:35993) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1e9dnN-0004Gj-Ua for bug-gnu-emacs@gnu.org; Tue, 31 Oct 2017 17:10:01 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1e9dnN-00079r-Lz for bug-gnu-emacs@gnu.org; Tue, 31 Oct 2017 17:10:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 31 Oct 2017 21:10:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 29066 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 29066-submit@debbugs.gnu.org id=B29066.150948418927491 (code B ref 29066); Tue, 31 Oct 2017 21:10:01 +0000 Original-Received: (at 29066) by debbugs.gnu.org; 31 Oct 2017 21:09:49 +0000 Original-Received: from localhost ([127.0.0.1]:44674 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1e9dnB-00079K-2d for submit@debbugs.gnu.org; Tue, 31 Oct 2017 17:09:49 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:46679) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1e9dn9-000793-Ds for 29066@debbugs.gnu.org; Tue, 31 Oct 2017 17:09:47 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1e9dn1-000418-0E for 29066@debbugs.gnu.org; Tue, 31 Oct 2017 17:09:42 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:49898) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e9dmZ-0003ou-GO; Tue, 31 Oct 2017 17:09:11 -0400 Original-Received: from [176.228.60.248] (port=1763 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1e9dmY-0000Nx-Vv; Tue, 31 Oct 2017 17:09:11 -0400 In-reply-to: <87375zxc69.fsf@linux-m68k.org> (message from Andreas Schwab on Tue, 31 Oct 2017 22:03:26 +0100) 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: 208.118.235.43 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:139290 Archived-At: > From: Andreas Schwab > Cc: vgatien-baron@janestreet.com, 29066@debbugs.gnu.org, mshinwell@janestreet.com > Date: Tue, 31 Oct 2017 22:03:26 +0100 > > >> A symbol on the symbol_free_list is a freed symbol, not available for > >> use. > > > > I guess you are saying that sweep_symbols has a bug? Because it hits > > this "freed" symbol every GC, AFAICT. > > Since GC is special, it needs to do special things. But the crash due to double-free did happen as part of GC doing those "special things". So we are talking about those special things, not something else.