From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.devel Subject: Re: Segfault in master Date: Wed, 04 Mar 2015 20:39:10 -0800 Organization: UCLA Computer Science Department Message-ID: <54F7DDEE.9080806@cs.ucla.edu> References: <877fuw7m46.fsf@fencepost.gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="------------050700040608030807050008" X-Trace: ger.gmane.org 1425530386 6755 80.91.229.3 (5 Mar 2015 04:39:46 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 5 Mar 2015 04:39:46 +0000 (UTC) To: David Kastrup , emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Mar 05 05:39:38 2015 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1YTNZR-0004cD-RG for ged-emacs-devel@m.gmane.org; Thu, 05 Mar 2015 05:39:37 +0100 Original-Received: from localhost ([::1]:48295 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YTNZQ-00051h-Ul for ged-emacs-devel@m.gmane.org; Wed, 04 Mar 2015 23:39:36 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:56387) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YTNZD-00051c-9Y for emacs-devel@gnu.org; Wed, 04 Mar 2015 23:39:24 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YTNZB-00066I-Il for emacs-devel@gnu.org; Wed, 04 Mar 2015 23:39:23 -0500 Original-Received: from smtp.cs.ucla.edu ([131.179.128.62]:53976) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YTNZ7-00064X-Qn; Wed, 04 Mar 2015 23:39:17 -0500 Original-Received: from localhost (localhost.localdomain [127.0.0.1]) by smtp.cs.ucla.edu (Postfix) with ESMTP id E845FA60013; Wed, 4 Mar 2015 20:39:10 -0800 (PST) X-Virus-Scanned: amavisd-new at smtp.cs.ucla.edu Original-Received: from smtp.cs.ucla.edu ([127.0.0.1]) by localhost (smtp.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id havIlmJL689s; Wed, 4 Mar 2015 20:39:10 -0800 (PST) Original-Received: from [192.168.1.9] (pool-100-32-155-148.lsanca.fios.verizon.net [100.32.155.148]) by smtp.cs.ucla.edu (Postfix) with ESMTPSA id A609EA60007; Wed, 4 Mar 2015 20:39:10 -0800 (PST) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 In-Reply-To: <877fuw7m46.fsf@fencepost.gnu.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 131.179.128.62 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:183657 Archived-At: This is a multi-part message in MIME format. --------------050700040608030807050008 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit That looks like yet another glibc bug we need to work around. Does the attached fix things for you? --------------050700040608030807050008 Content-Type: text/x-patch; name="bt.diff" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="bt.diff" diff --git a/src/sysdep.c b/src/sysdep.c index cb361ec..c524656 100644 --- a/src/sysdep.c +++ b/src/sysdep.c @@ -2174,7 +2174,7 @@ emacs_backtrace (int backtrace_limit) else { buffer = main_backtrace_buffer; - npointers = backtrace (buffer, bounded_limit + 1); + npointers = backtrace (buffer, bounded_limit + 1 + (bounded_limit < 0)); } if (npointers) --------------050700040608030807050008--