From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.bugs Subject: bug#8623: 23.3.50; (woman "git-remote") crashes Date: Fri, 06 May 2011 07:37:17 -0700 Organization: UCLA Computer Science Department Message-ID: <4DC4079D.7030709@cs.ucla.edu> References: <878vukrjsu.fsf@turtle.gmx.de> <83d3jwnai7.fsf@gnu.org> <87zkn0q2bx.fsf@turtle.gmx.de> <8362pom8ww.fsf@gnu.org> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Trace: dough.gmane.org 1304692698 11910 80.91.229.12 (6 May 2011 14:38:18 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Fri, 6 May 2011 14:38:18 +0000 (UTC) Cc: Sven Joachim , 8623@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri May 06 16:38:10 2011 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([140.186.70.17]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1QIMAQ-0004zQ-Q4 for geb-bug-gnu-emacs@m.gmane.org; Fri, 06 May 2011 16:38:06 +0200 Original-Received: from localhost ([::1]:59902 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QIMAQ-0006L0-3f for geb-bug-gnu-emacs@m.gmane.org; Fri, 06 May 2011 10:38:06 -0400 Original-Received: from eggs.gnu.org ([140.186.70.92]:60018) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QIMAN-0006Ka-CO for bug-gnu-emacs@gnu.org; Fri, 06 May 2011 10:38:04 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QIMAM-0005jV-HG for bug-gnu-emacs@gnu.org; Fri, 06 May 2011 10:38:03 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:59134) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QIMAM-0005jJ-FZ for bug-gnu-emacs@gnu.org; Fri, 06 May 2011 10:38:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.69) (envelope-from ) id 1QIMAM-0005KH-1R; Fri, 06 May 2011 10:38:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Paul Eggert Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-To: owner@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 06 May 2011 14:38:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 8623 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 8623-submit@debbugs.gnu.org id=B8623.130469266620449 (code B ref 8623); Fri, 06 May 2011 14:38:01 +0000 Original-Received: (at 8623) by debbugs.gnu.org; 6 May 2011 14:37:46 +0000 Original-Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1QIMA5-0005Jm-Kr for submit@debbugs.gnu.org; Fri, 06 May 2011 10:37:45 -0400 Original-Received: from smtp.cs.ucla.edu ([131.179.128.62]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1QIM9y-0005JL-6b for 8623@debbugs.gnu.org; Fri, 06 May 2011 10:37:40 -0400 Original-Received: from localhost (localhost.localdomain [127.0.0.1]) by smtp.cs.ucla.edu (Postfix) with ESMTP id A332B39E8113; Fri, 6 May 2011 07:37:29 -0700 (PDT) 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 Nze2e2GhM1oD; Fri, 6 May 2011 07:37:29 -0700 (PDT) Original-Received: from [192.168.1.10] (pool-71-189-109-235.lsanca.fios.verizon.net [71.189.109.235]) by smtp.cs.ucla.edu (Postfix) with ESMTPSA id 1F7EA39E810D; Fri, 6 May 2011 07:37:29 -0700 (PDT) User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.17) Gecko/20110424 Thunderbird/3.1.10 In-Reply-To: <8362pom8ww.fsf@gnu.org> X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list Resent-Date: Fri, 06 May 2011 10:38:02 -0400 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 140.186.70.43 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-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:46272 Archived-At: On 05/06/11 03:15, Eli Zaretskii wrote: > Paul, could you please take a look at this? Could this be due to the > same problems with GCC 4.6 optimizations you recently fixed on the > trunk? If so, we may need similar changes on the release branch. Yeowch. I don't have easy access to a Debian unstable host, and even if I did, I don't relish the job of looking into the details as to why it crashed. That aliasing patch was motivated by two things: (1) I had a smoking gun in which GCC 4.6.0 clearly generated code that would crash Emacs, when Emacs was compiled in debugging mode. (2) I had the strong suspicion that other aliasing problems were elsewhere in Emacs, even when not debugging, and that it would be very difficult to track them down. I'd guess that we're seeing (2) here, but *proving* that could be a lot of work. How about if we do this instead: (A) merge the aliasing patch into Emacs 23, (B) see if this works for Sven; (C) if it does, commit it into the 23 branch. That should be less work than proving that this is an instance of (2).