From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Richard Stallman Newsgroups: gmane.emacs.bugs Subject: bug#15688: 24.3.50; clear-temporary-overlay-map Date: Tue, 04 Mar 2014 16:55:18 -0500 Message-ID: References: <52E1DCC7.7000609@yandex.ru> <83txctcsi6.fsf@gnu.org> <83wqhob0kc.fsf@gnu.org> <83a9ejbdpt.fsf@gnu.org> Reply-To: rms@gnu.org NNTP-Posting-Host: plane.gmane.org Content-Type: text/plain; charset=ISO-8859-15 X-Trace: ger.gmane.org 1393970163 8744 80.91.229.3 (4 Mar 2014 21:56:03 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 4 Mar 2014 21:56:03 +0000 (UTC) Cc: 15688@debbugs.gnu.org To: monnier@IRO.UMontreal.CA Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Mar 04 22:56:10 2014 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1WKxJq-0008RS-6G for geb-bug-gnu-emacs@m.gmane.org; Tue, 04 Mar 2014 22:56:10 +0100 Original-Received: from localhost ([::1]:48752 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WKxJp-0005Q1-Tn for geb-bug-gnu-emacs@m.gmane.org; Tue, 04 Mar 2014 16:56:09 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:46233) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WKxJm-0005Pw-2S for bug-gnu-emacs@gnu.org; Tue, 04 Mar 2014 16:56:06 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WKxJi-0005Qy-2T for bug-gnu-emacs@gnu.org; Tue, 04 Mar 2014 16:56:06 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:49675) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WKxJh-0005Qu-Vb for bug-gnu-emacs@gnu.org; Tue, 04 Mar 2014 16:56:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1WKxJh-0002pe-Mn for bug-gnu-emacs@gnu.org; Tue, 04 Mar 2014 16:56:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Richard Stallman Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 04 Mar 2014 21:56:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 15688 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: moreinfo Original-Received: via spool by 15688-submit@debbugs.gnu.org id=B15688.139397012310826 (code B ref 15688); Tue, 04 Mar 2014 21:56:01 +0000 Original-Received: (at 15688) by debbugs.gnu.org; 4 Mar 2014 21:55:23 +0000 Original-Received: from localhost ([127.0.0.1]:50857 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1WKxJ4-0002oY-Ub for submit@debbugs.gnu.org; Tue, 04 Mar 2014 16:55:23 -0500 Original-Received: from fencepost.gnu.org ([208.118.235.10]:49127) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1WKxJ1-0002oO-Hx for 15688@debbugs.gnu.org; Tue, 04 Mar 2014 16:55:20 -0500 Original-Received: from rms by fencepost.gnu.org with local (Exim 4.71) (envelope-from ) id 1WKxJ0-0000rZ-BL; Tue, 04 Mar 2014 16:55:18 -0500 In-reply-to: <83a9ejbdpt.fsf@gnu.org> (message from Eli Zaretskii on Sun, 26 Jan 2014 05:53:50 +0200) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x 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:86555 Archived-At: [[[ To any NSA and FBI agents reading my email: please consider ]]] [[[ whether defending the US Constitution against all enemies, ]]] [[[ foreign or domestic, requires you to follow Snowden's example. ]]] I got more information about this bug. The crash occurs when mark_stack calls mark_memory. pp is pointing at a stack slot in Fgarbage_collect. As far as I can tell by looking at the code of Fgarbage_collect with x/i, that slot is never actually used -- it contains junk left over from previous function calls. I am surprised this unoptimized compilation makes a stack slot that is not actually used. Maybe it is used in some unobvious way. It is 16(sp). This suggests that the problem cannot be fixed by trying to prevent a pointer to clear-temporary-map from being found and marked. I wrote a change in the Lisp code to fix this problem, then ran without it to get more info about the problem. I think I should install that fix soon, but I can hold off longer if you want. Please respond. -- Dr Richard Stallman President, Free Software Foundation 51 Franklin St Boston MA 02110 USA www.fsf.org www.gnu.org Skype: No way! That's nonfree (freedom-denying) software. Use Ekiga or an ordinary phone call.