From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#39977: 28.0.50; Unhelpful stack trace Date: Wed, 18 Mar 2020 16:53:13 +0200 Message-ID: <83imj1g1eu.fsf@gnu.org> References: <83zhcs80e5.fsf@gnu.org> <83imj88tpt.fsf@gnu.org> <550fbc22-09db-d30b-c194-8f26b5dca05f@gmx.at> <83wo7o6nxs.fsf@gnu.org> <60dd4ced-a2e5-ed17-0570-b7bdd2a557af@gmx.at> <83blozckn2.fsf@gnu.org> <01305dbc-c69b-baf9-f0bf-1e5b8c04d970@gmx.at> <83y2s2bswl.fsf@gnu.org> <3ac189d0-5d05-fdf9-0922-0c464b1b17c3@gmx.at> <83k13lbgux.fsf@gnu.org> <83d09cb9gz.fsf@gnu.org> <69a74f9e-079b-a771-0213-f60ed0bf5720@gmx.at> <83y2rzf08m.fsf@gnu.org> <7a0b9999-6778-6235-fbc9-2a24b4e3bc53@gmx.at> <83tv2mg9j0.fsf@gnu.org> <9684641c-a59a-4ed6-a6b4-d3238f789050@gmx.at> <83sgi6g461.fsf@gnu.org> <90ac4084-4fbb-b5d7-6a7c-597d8f08e88a@gmx.at> Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="57138"; mail-complaints-to="usenet@ciao.gmane.io" Cc: enometh@meer.net, 39977@debbugs.gnu.org To: martin rudalics Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Mar 18 15:56:48 2020 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1jEa7k-000Ely-Fs for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 18 Mar 2020 15:56:48 +0100 Original-Received: from localhost ([::1]:51944 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jEa7j-0006vz-Ap for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 18 Mar 2020 10:56:47 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:47221) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jEa54-00039o-VB for bug-gnu-emacs@gnu.org; Wed, 18 Mar 2020 10:54:04 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jEa53-0007WP-Pv for bug-gnu-emacs@gnu.org; Wed, 18 Mar 2020 10:54:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:35052) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1jEa53-0007UM-L2 for bug-gnu-emacs@gnu.org; Wed, 18 Mar 2020 10:54:01 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1jEa53-00044E-Jt for bug-gnu-emacs@gnu.org; Wed, 18 Mar 2020 10:54:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 18 Mar 2020 14:54:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 39977 X-GNU-PR-Package: emacs Original-Received: via spool by 39977-submit@debbugs.gnu.org id=B39977.158454322015608 (code B ref 39977); Wed, 18 Mar 2020 14:54:01 +0000 Original-Received: (at 39977) by debbugs.gnu.org; 18 Mar 2020 14:53:40 +0000 Original-Received: from localhost ([127.0.0.1]:41025 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1jEa4i-00043g-Bo for submit@debbugs.gnu.org; Wed, 18 Mar 2020 10:53:40 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:60017) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1jEa4h-00043S-NL for 39977@debbugs.gnu.org; Wed, 18 Mar 2020 10:53:39 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:55636) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1jEa4b-00036q-UC; Wed, 18 Mar 2020 10:53:33 -0400 Original-Received: from [176.228.60.248] (port=2517 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1jEa4X-00024i-W2; Wed, 18 Mar 2020 10:53:33 -0400 In-Reply-To: <90ac4084-4fbb-b5d7-6a7c-597d8f08e88a@gmx.at> (message from martin rudalics on Wed, 18 Mar 2020 10:12:32 +0100) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.51.188.43 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-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:177498 Archived-At: > Cc: enometh@meer.net, 39977@debbugs.gnu.org > From: martin rudalics > Date: Wed, 18 Mar 2020 10:12:32 +0100 > > > Feel free > > to fix this (whatever it is) as you see fit. > > The longer I'm looking into this, the more I think that we should be > much more restrictive wrt what an :eval form in mode line or title name > processing should be allowed to do. Tab bars could provide even more > confusion. I think we should disallow any such :eval to kill buffers > and delete windows or frames at the very least. So we are talking about :eval in mode-line-format (and similar variables)? > Maybe it should be also disallowed to select a window or frame or > whatever the display engine tries to restore after processing these > forms. Such selections would be usually undone anyway by the display > engine. Probably, we should disallow such :eval forms to modify > "anything" at all but I have no idea how to do that. I'm not sure we can detect these actions reliably, as Lisp code can be very complex. I think we can only handle the consequences of those actions. Which is why I proposed to deal with that in SELECTED_FRAME (we could, of course, find some other place where the disastrous results of such code can be detected).