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#48843: pos_visible_p segfault Date: Sat, 05 Jun 2021 10:05:55 +0300 Message-ID: <835yyslrjg.fsf@gnu.org> References: <1248dea7d81e36661bd9158a0c5076d2bea6f5dd.camel@librehacker.com> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="8783"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 48843-done@debbugs.gnu.org To: Christopher Howard Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sat Jun 05 09:07:10 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 1lpQOk-00024q-GB for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 05 Jun 2021 09:07:10 +0200 Original-Received: from localhost ([::1]:48090 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lpQOi-00058X-Hd for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 05 Jun 2021 03:07:08 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:54516) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lpQOc-00058H-GY for bug-gnu-emacs@gnu.org; Sat, 05 Jun 2021 03:07:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:36692) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lpQOc-0007Pz-AE for bug-gnu-emacs@gnu.org; Sat, 05 Jun 2021 03:07:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1lpQOb-0007At-UG for bug-gnu-emacs@gnu.org; Sat, 05 Jun 2021 03:07:01 -0400 Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-To: bug-gnu-emacs@gnu.org Resent-Date: Sat, 05 Jun 2021 07:07:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: cc-closed 48843 X-GNU-PR-Package: emacs Mail-Followup-To: 48843@debbugs.gnu.org, eliz@gnu.org, christopher@librehacker.com Original-Received: via spool by 48843-done@debbugs.gnu.org id=D48843.162287677527510 (code D ref 48843); Sat, 05 Jun 2021 07:07:01 +0000 Original-Received: (at 48843-done) by debbugs.gnu.org; 5 Jun 2021 07:06:15 +0000 Original-Received: from localhost ([127.0.0.1]:48237 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lpQNn-00079Z-0N for submit@debbugs.gnu.org; Sat, 05 Jun 2021 03:06:15 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:60752) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lpQNh-00078z-IH for 48843-done@debbugs.gnu.org; Sat, 05 Jun 2021 03:06:10 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:41020) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lpQNb-0006mh-GX; Sat, 05 Jun 2021 03:06:00 -0400 Original-Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:1838 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lpQNb-0006P3-2B; Sat, 05 Jun 2021 03:05:59 -0400 In-Reply-To: <1248dea7d81e36661bd9158a0c5076d2bea6f5dd.camel@librehacker.com> (message from Christopher Howard on Fri, 04 Jun 2021 21:05:52 -0800) 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:208045 Archived-At: > From: Christopher Howard > Date: Fri, 04 Jun 2021 21:05:52 -0800 > > Hello, I am able to consistently reproduce a segfault under rather > precise conditions, when I am doing a search while comparing two files > using emacs-vdiff. The segfault seems to be happening in pos_visible_p. > > GNU Emacs 27.2 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.24, > cairo version 1.16.0) > > christopher@nightshade ~$ guix describe > Generation 7 Jun 04 2021 15:20:58 (current) > guix 7382aa0 > repository URL: https://git.savannah.gnu.org/git/guix.git > branch: master > commit: 7382aa00b82860762bc326dec6b45f8cd2161327 > > christopher@nightshade ~$ guix show emacs-vdiff | grep version > version: 0.2.4 > > christopher@nightshade ~$ neofetch --stdout | grep CPU > CPU: AMD Athlon II X3 455 (3) @ 3.300GHz > > Steps to reproduce: > > - Starts Emacs (in Gnome or in virtual console) > - M-x vdiff-file > - for file 1: my.dump (attached) > - for file 2: upstream.dump (attached) > - while in file 1 buffer: C-s 1 e 2 d > > I figured out how to get a backtrace in gdb: > > Thread 1 ".emacs-27.2-rea" received signal SIGSEGV, Segmentation fault. > 0x000000000045c447 in pos_visible_p () > (gdb) bt > #0 0x000000000045c447 in pos_visible_p () > #1 0x000000000047ddab in Fpos_visible_in_window_p () Thanks. This is a known bug in Emacs 27.2 (see bug#45156), which is already fixed on the master branch. So I'm closing this bug.