From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.help Subject: Re: help debugging a segfault Date: Tue, 18 Oct 2016 08:45:19 +0300 Message-ID: <83k2d6xlao.fsf@gnu.org> References: NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1476769574 21762 195.159.176.226 (18 Oct 2016 05:46:14 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 18 Oct 2016 05:46:14 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Tue Oct 18 07:46:10 2016 Return-path: Envelope-to: geh-help-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 1bwNDu-000408-UQ for geh-help-gnu-emacs@m.gmane.org; Tue, 18 Oct 2016 07:46:03 +0200 Original-Received: from localhost ([::1]:39066 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bwNDw-00008V-Q4 for geh-help-gnu-emacs@m.gmane.org; Tue, 18 Oct 2016 01:46:04 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:60103) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bwNDY-00008E-MC for help-gnu-emacs@gnu.org; Tue, 18 Oct 2016 01:45:41 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bwNDV-00026d-Gi for help-gnu-emacs@gnu.org; Tue, 18 Oct 2016 01:45:40 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:57080) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bwNDV-00026Z-AG for help-gnu-emacs@gnu.org; Tue, 18 Oct 2016 01:45:37 -0400 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:2718 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.82) (envelope-from ) id 1bwNDU-00021w-Kw for help-gnu-emacs@gnu.org; Tue, 18 Oct 2016 01:45:37 -0400 In-reply-to: (message from Sam Halliday on Mon, 17 Oct 2016 13:16:33 -0700 (PDT)) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:4830:134:3::e X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.org gmane.emacs.help:111556 Archived-At: > Date: Mon, 17 Oct 2016 13:16:33 -0700 (PDT) > From: Sam Halliday > > Despite being very stable since I installed it when released, Emacs 25.1 has started to segfault on me this week in a hard-to-reproduce manner. > > I use ArchLinux and I recompiled with debugging symbols to obtain a detailed core dump / crash log. > > But this is all I got when running with gdb until it crashed: > > ============================= > Thread 1 "emacs" received signal SIGSEGV, Segmentation fault. > re_search_2 (bufp=bufp@entry=0xc2d460 , str1=str1@entry=0x597b790 , size1=size1@entry=0, > str2=str2@entry=0x597b790 , size2=65565, startpos=646, startpos@entry=623, range=509, > regs=0xc2c8d0 , stop=1155) at regex.c:4464 > 4464 int len = BYTES_BY_CHAR_HEAD (*p); > ============================= Sounds like another case of bug#24358, see https://debbugs.gnu.org/cgi/bugreport.cgi?bug=24358#41 and the following discussion. Your OS is also the same as reported there, which increases the probability of this being the same issue. If you ever succeed in getting meaningful data about the crash, or some way of reproducing it, please post to 24358@debbugs.gnu.org.