From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Jason Rumney Newsgroups: gmane.emacs.bugs Subject: bug#716: Bug in buffer-swap-text Date: Tue, 23 Dec 2008 20:45:20 +0800 Message-ID: <4950DD60.4080202@gnu.org> References: Reply-To: Jason Rumney , 716@emacsbugs.donarmstrong.com NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1230037584 7335 80.91.229.12 (23 Dec 2008 13:06:24 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 23 Dec 2008 13:06:24 +0000 (UTC) Cc: 716@emacsbugs.donarmstrong.com To: Stefan Monnier , Magnus Henoch Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Dec 23 14:07:30 2008 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1LF6yk-0001K6-Uo for geb-bug-gnu-emacs@m.gmane.org; Tue, 23 Dec 2008 14:07:19 +0100 Original-Received: from localhost ([127.0.0.1]:57304 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1LF6xY-0000NC-4X for geb-bug-gnu-emacs@m.gmane.org; Tue, 23 Dec 2008 08:06:04 -0500 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1LF6xV-0000N4-9P for bug-gnu-emacs@gnu.org; Tue, 23 Dec 2008 08:06:01 -0500 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1LF6xT-0000Lw-EG for bug-gnu-emacs@gnu.org; Tue, 23 Dec 2008 08:06:00 -0500 Original-Received: from [199.232.76.173] (port=50297 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1LF6xS-0000Ls-R5 for bug-gnu-emacs@gnu.org; Tue, 23 Dec 2008 08:05:58 -0500 Original-Received: from rzlab.ucr.edu ([138.23.92.77]:36785) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1LF6xS-0008Ri-9V for bug-gnu-emacs@gnu.org; Tue, 23 Dec 2008 08:05:58 -0500 Original-Received: from rzlab.ucr.edu (rzlab.ucr.edu [127.0.0.1]) by rzlab.ucr.edu (8.13.8/8.13.8/Debian-3) with ESMTP id mBND3KDw012503; Tue, 23 Dec 2008 05:03:20 -0800 Original-Received: (from debbugs@localhost) by rzlab.ucr.edu (8.13.8/8.13.8/Submit) id mBNCo4HC007681; Tue, 23 Dec 2008 04:50:04 -0800 X-Loop: owner@emacsbugs.donarmstrong.com Resent-From: Jason Rumney Original-Sender: Jason Rumney Resent-To: bug-submit-list@donarmstrong.com Resent-CC: Emacs Bugs , owner@emacsbugs.donarmstrong.com Resent-Date: Tue, 23 Dec 2008 12:50:04 +0000 Resent-Message-ID: Resent-Sender: owner@emacsbugs.donarmstrong.com X-Emacs-PR-Message: followup 716 X-Emacs-PR-Package: emacs,w32 X-Emacs-PR-Keywords: Original-Received: via spool by 716-submit@emacsbugs.donarmstrong.com id=B716.12300363557100 (code B ref 716); Tue, 23 Dec 2008 12:50:04 +0000 Original-Received: (at 716) by emacsbugs.donarmstrong.com; 23 Dec 2008 12:45:55 +0000 X-Spam-Bayes: score:0.5 Bayes not run. spammytokens:Tokens not available. hammytokens:Tokens not available. 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([118.101.181.97]) by mx.google.com with ESMTPS id w12sm1026404tib.13.2008.12.23.04.45.48 (version=TLSv1/SSLv3 cipher=RC4-MD5); Tue, 23 Dec 2008 04:45:49 -0800 (PST) User-Agent: Thunderbird 2.0.0.18 (Windows/20081105) In-Reply-To: X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6 (newer, 3) Resent-Date: Tue, 23 Dec 2008 08:06:00 -0500 X-BeenThere: bug-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:23443 Archived-At: Stefan Monnier wrote: >> I can reliably get a crash without changing coding systems: >> (progn >> (buffer-swap-text (generate-new-buffer "test")) >> (insert (make-string 128 ?a))) >> >> (progn >> (buffer-swap-text (generate-new-buffer "test")) >> (garbage-collect)) >> > > I cannot seem to reproduce it here, tho I'm not 100% sure how you run > the above code. Could you give a more detailed recipe, starting from > "emacs -Q" and showing whether you use M-: or C-x C-e, ... ? > One possible variable here is the way that buffer space is allocated. On Windows, it seems REL_ALLOC is defined. I presume GNU/Linux defines USE_MMAP_FOR_BUFFERS which would cause it to take a different code path around the point where we see a crash on Windows, and as Magnus Henoch saw on NetBSD/powerpc also (though we don't have a stack trace for that crash, so can't tell for sure it is crashing in the same place). Magnus, does src/config.h have either of these constants defined on your NetBSD/powerpc machine? A third possibility if neither of those are defined is that xmalloc/xfree/xrealloc are used.