From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= Newsgroups: gmane.emacs.bugs Subject: bug#48479: 28.0.50; Crash on `read--expression' Date: Tue, 18 May 2021 17:00:33 +0200 Message-ID: <7D502665-A194-477F-89EF-89E617AA1109@acm.org> References: <8635ulvbbx.fsf@protected.rcdrun.com> <835yzhtmt7.fsf@gnu.org> <266671C9-C9F1-4CF1-AA2C-F8D6FD64C470@acm.org> <83r1i4s2kd.fsf@gnu.org> Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.20\)) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="33892"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 48479@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Tue May 18 17:09:20 2021 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 1lj1LS-0008Ye-2M for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 18 May 2021 17:09:18 +0200 Original-Received: from localhost ([::1]:41568 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lj1LR-000800-4W for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 18 May 2021 11:09:17 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:58062) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lj1DU-0006V2-FA for bug-gnu-emacs@gnu.org; Tue, 18 May 2021 11:01:07 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:45367) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lj1DS-0004KS-Ay for bug-gnu-emacs@gnu.org; Tue, 18 May 2021 11:01:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1lj1DS-0002CG-8j for bug-gnu-emacs@gnu.org; Tue, 18 May 2021 11:01:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 18 May 2021 15:01:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 48479 X-GNU-PR-Package: emacs Original-Received: via spool by 48479-submit@debbugs.gnu.org id=B48479.16213500408408 (code B ref 48479); Tue, 18 May 2021 15:01:02 +0000 Original-Received: (at 48479) by debbugs.gnu.org; 18 May 2021 15:00:40 +0000 Original-Received: from localhost ([127.0.0.1]:56913 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lj1D6-0002BY-9A for submit@debbugs.gnu.org; Tue, 18 May 2021 11:00:40 -0400 Original-Received: from mail71c50.megamailservers.eu ([91.136.10.81]:58370 helo=mail92c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lj1D4-0002BP-TG for 48479@debbugs.gnu.org; Tue, 18 May 2021 11:00:39 -0400 X-Authenticated-User: mattiase@bredband.net DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1621350037; bh=7fu0Vy3hA67d4uzTAEWA3GpWT0sJx+IKXAym39wlMbo=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=s78BViemUtlvXz+VRm8weD0W1HaUNOLyd7rMn/hSLoGkKpKt5EG+5e+W5uT1cgoq6 XKnUOyvpyHw1ZlocOLn0c5AJN4NhxCB3ADqkekqUoYw/bRSrHOPwxRNdeAiFN9mPu5 I+jbUCJDmp0xjCK5RsrFuRe/HrJlJoMRdO8d2zsA= Feedback-ID: mattiase@acm.or Original-Received: from stanniol.lan (c-b952e353.032-75-73746f71.bbcust.telenor.se [83.227.82.185]) (authenticated bits=0) by mail92c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 14IF0Ypv023230; Tue, 18 May 2021 15:00:36 +0000 In-Reply-To: <83r1i4s2kd.fsf@gnu.org> X-Mailer: Apple Mail (2.3445.104.20) X-CTCH-RefID: str=0001.0A742F28.60A3D694.00C4, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: 0.000 X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=UJ+j4xXy c=1 sm=1 tr=0 a=von4qPfY+hyqc0zmWf0tYQ==:117 a=von4qPfY+hyqc0zmWf0tYQ==:17 a=kj9zAlcOel0A:10 a=M51BFTxLslgA:10 a=mDV3o1hIAAAA:8 a=nl-gccGqcs8j1C9MQwIA:9 a=CjuIK1q_8ugA:10 a=_FVE-zBwftR9WsbkzFJk:22 X-Origin-Country: SE X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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:206795 Archived-At: 18 maj 2021 kl. 13.29 skrev Eli Zaretskii : > What would be the advantage of making it an error? Detecting mistakes, early. There are many possible reasons for making = ones; misplaced brackets is but one. In the Lisp implementation tradition we do not benefit from a monolithic = parser that verifies all aspects of the grammar in one go, so extra care = has to be taken in each special form. A sloppy parse is unhelpful: it = hides mistakes and impedes backward-compatible language evolution. There = is no advantage to it. Furthermore, reporting syntax errors as warnings but still accepting the = code really makes no sense, other as a temporary measure to avoid = breaking invalid code right away (if that is seen as something = positive).