From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: martin rudalics Newsgroups: gmane.emacs.bugs Subject: bug#12251: 24.2.50; crash in note_mouse_highlight Date: Fri, 24 Aug 2012 11:44:57 +0200 Message-ID: <50374D19.3020201@gmx.at> References: <87obm4ayyn.fsf@gnu.org> <83fw7gaxyx.fsf@gnu.org> <87k3wsax0k.fsf@gnu.org> <83ehn0aw3p.fsf@gnu.org> <87sjbfhcii.fsf@gnu.org> <83vcgaam5w.fsf@gnu.org> <5035EE6B.50208@gmx.at> <83ipc9a8bl.fsf@gnu.org> <50366607.7090209@gmx.at> <836289a1pz.fsf@gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1345801540 26103 80.91.229.3 (24 Aug 2012 09:45:40 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 24 Aug 2012 09:45:40 +0000 (UTC) Cc: sds@gnu.org, 12251@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Aug 24 11:45:41 2012 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 1T4qSR-0003nc-LE for geb-bug-gnu-emacs@m.gmane.org; Fri, 24 Aug 2012 11:45:39 +0200 Original-Received: from localhost ([::1]:57174 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1T4qSP-000755-Ii for geb-bug-gnu-emacs@m.gmane.org; Fri, 24 Aug 2012 05:45:37 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:47717) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1T4qSJ-00074x-BZ for bug-gnu-emacs@gnu.org; Fri, 24 Aug 2012 05:45:36 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1T4qSF-0001Uv-Dj for bug-gnu-emacs@gnu.org; Fri, 24 Aug 2012 05:45:31 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:36786) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1T4qSF-0001Uq-9r for bug-gnu-emacs@gnu.org; Fri, 24 Aug 2012 05:45:27 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.72) (envelope-from ) id 1T4qSn-0003SI-Sg for bug-gnu-emacs@gnu.org; Fri, 24 Aug 2012 05:46:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: martin rudalics Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 24 Aug 2012 09:46:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 12251 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 12251-submit@debbugs.gnu.org id=B12251.134580154313256 (code B ref 12251); Fri, 24 Aug 2012 09:46:01 +0000 Original-Received: (at 12251) by debbugs.gnu.org; 24 Aug 2012 09:45:43 +0000 Original-Received: from localhost ([127.0.0.1]:46331 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1T4qSV-0003Rl-4Y for submit@debbugs.gnu.org; Fri, 24 Aug 2012 05:45:43 -0400 Original-Received: from mailout-de.gmx.net ([213.165.64.23]:45884) by debbugs.gnu.org with smtp (Exim 4.72) (envelope-from ) id 1T4qSS-0003Rc-NG for 12251@debbugs.gnu.org; Fri, 24 Aug 2012 05:45:42 -0400 Original-Received: (qmail invoked by alias); 24 Aug 2012 09:45:04 -0000 Original-Received: from 62-47-46-0.adsl.highway.telekom.at (EHLO [62.47.46.0]) [62.47.46.0] by mail.gmx.net (mp033) with SMTP; 24 Aug 2012 11:45:04 +0200 X-Authenticated: #14592706 X-Provags-ID: V01U2FsdGVkX19hv7R8fy9ho56dfjs1I86/cDdL/3f/+szspD/6ny 8ablk7gjdNLwro In-Reply-To: <836289a1pz.fsf@gnu.org> X-Y-GMX-Trusted: 0 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.13 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) 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:63448 Archived-At: >> The error was obviously thrown from Lisp which per se is harmless. But >> I'm quite convinced that it was thrown by a Lisp function directly or >> indirectly called from C. > > Why do you think that? An error with code attempting to operate on a dead window within "normal" Lisp is a strange case. It can be due to users leaving a dangling reference to such a window somewhere in their code but I doubt that many people do that. And when such an error happens, there is no reason why it should expand into a crash. The (implicit) invariants of a window tree should not be violated by Elisp code. OTOH, calling an Elisp function from C in a state where the window tree invariants are temporarily violated can easily lead to a crash. >> How could we explain a crash if it's all within Lisp code? > > It's not within Lisp anymore; the error throws to top-level, and Emacs > tries to read input, at which time it gets a mouse event. That would be a _very_ strange coinicidence. martin