From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#38035: 27.0.50; Trivial errors in process filters can render Emacs unusable Date: Sun, 03 Nov 2019 17:51:30 +0200 Message-ID: <83ftj5hsal.fsf@gnu.org> References: <874kzmdv0q.fsf@gnus.org> Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="179717"; mail-complaints-to="usenet@blaine.gmane.org" Cc: larsi@gnus.org, 38035@debbugs.gnu.org To: rms@gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Nov 03 16:52:10 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1iRIAk-000kfl-5t for geb-bug-gnu-emacs@m.gmane.org; Sun, 03 Nov 2019 16:52:10 +0100 Original-Received: from localhost ([::1]:54330 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iRIAj-0005rW-3L for geb-bug-gnu-emacs@m.gmane.org; Sun, 03 Nov 2019 10:52:09 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:45181) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iRIAd-0005rA-29 for bug-gnu-emacs@gnu.org; Sun, 03 Nov 2019 10:52:03 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iRIAc-0003O8-65 for bug-gnu-emacs@gnu.org; Sun, 03 Nov 2019 10:52:03 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:54276) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1iRIAc-0003O4-3J for bug-gnu-emacs@gnu.org; Sun, 03 Nov 2019 10:52:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1iRIAb-0006is-Vg for bug-gnu-emacs@gnu.org; Sun, 03 Nov 2019 10:52:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 03 Nov 2019 15:52:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 38035 X-GNU-PR-Package: emacs Original-Received: via spool by 38035-submit@debbugs.gnu.org id=B38035.157279629525796 (code B ref 38035); Sun, 03 Nov 2019 15:52:01 +0000 Original-Received: (at 38035) by debbugs.gnu.org; 3 Nov 2019 15:51:35 +0000 Original-Received: from localhost ([127.0.0.1]:34864 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iRIAB-0006i0-3h for submit@debbugs.gnu.org; Sun, 03 Nov 2019 10:51:35 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:36060) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iRIA9-0006hm-Af for 38035@debbugs.gnu.org; Sun, 03 Nov 2019 10:51:33 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:42385) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1iRIA4-0003E5-4P; Sun, 03 Nov 2019 10:51:28 -0500 Original-Received: from [176.228.60.248] (port=4853 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1iRI9w-0006e8-Pe; Sun, 03 Nov 2019 10:51:21 -0500 In-reply-to: (message from Richard Stallman on Sun, 03 Nov 2019 08:21:12 -0500) 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.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:170880 Archived-At: > From: Richard Stallman > Date: Sun, 03 Nov 2019 08:21:12 -0500 > Cc: 38035@debbugs.gnu.org > > The special code to make errors in filters visible is an important > feature. It prevents confusion, whereby users don't understand > what is failing because they don't see the error messages. > > It also makes possible, as you've pointed out, one more way you can > screw yourself with a perverse Lisp program -- but is it worth trying > to fix that? The current idea for a fix is to let the error be displayed several times, until and unless it is clear that the error is repeatedly signaled with a very high frequency, and if so, disable the filter for that process. I think this strikes the right balance between showing the error to users and still leaving Emacs in a usable state.