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: Wed, 18 Mar 2020 16:08:00 +0200 Message-ID: <83o8stg3i7.fsf@gnu.org> References: <24162.58107.725366.668639@cochabamba.vanoostrum.org> <83y2s48yn7.fsf@gnu.org> <83zhck6obg.fsf@gnu.org> <83r1xv73ze.fsf@gnu.org> <83imj5bdct.fsf@gnu.org> <83zhcff131.fsf@gnu.org> <2b2fc990-2917-7970-d88b-7708dbaa48be@cs.ucla.edu> Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="89388"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 39962@debbugs.gnu.org, eggert@cs.ucla.edu, pieter-l@vanoostrum.org To: Pip Cet Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Mar 18 15:09:13 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 1jEZNg-000N6u-Ck for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 18 Mar 2020 15:09:12 +0100 Original-Received: from localhost ([::1]:51146 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jEZNf-00037v-CJ for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 18 Mar 2020 10:09:11 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:47648) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jEZNX-00037m-LZ for bug-gnu-emacs@gnu.org; Wed, 18 Mar 2020 10:09:05 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jEZNW-00073F-N9 for bug-gnu-emacs@gnu.org; Wed, 18 Mar 2020 10:09:03 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:35001) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1jEZNW-00071r-JX for bug-gnu-emacs@gnu.org; Wed, 18 Mar 2020 10:09:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1jEZNW-0002yT-9w for bug-gnu-emacs@gnu.org; Wed, 18 Mar 2020 10:09:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 18 Mar 2020 14:09:02 +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=B39962.158454049811382 (code B ref 39962); Wed, 18 Mar 2020 14:09:02 +0000 Original-Received: (at 39962) by debbugs.gnu.org; 18 Mar 2020 14:08:18 +0000 Original-Received: from localhost ([127.0.0.1]:40974 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1jEZMn-0002xV-VA for submit@debbugs.gnu.org; Wed, 18 Mar 2020 10:08:18 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:60574) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1jEZMl-0002xJ-ID for 39962@debbugs.gnu.org; Wed, 18 Mar 2020 10:08:15 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:54649) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1jEZMf-0004Nt-St; Wed, 18 Mar 2020 10:08:09 -0400 Original-Received: from [176.228.60.248] (port=3475 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1jEZMc-00061n-Jf; Wed, 18 Mar 2020 10:08:09 -0400 In-Reply-To: (message from Pip Cet on Wed, 18 Mar 2020 06:17:01 +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:177492 Archived-At: > From: Pip Cet > Date: Wed, 18 Mar 2020 06:17:01 +0000 > Cc: Eli Zaretskii , Pieter van Oostrum , 39962@debbugs.gnu.org > > > Although I haven't been following this in detail, I'd like to suggest trying a > > GDB watchpoint to find the bug. Watchpoints have been invaluable to me when I > > debug garbage-collector and other memory management issues. > > They are! Unfortunately, they require a predictable address at which > the corruption happens, and we don't appear to have that. It would suffice to have a predictable recipe where some variable has the right value under some conditions: then we could put a watchpoint using that variable's value from a conditional breakpoint that only triggers under those conditions. Unfortunately, it sounds like even such a predictable recipe is not available.