From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Andreas Schwab Newsgroups: gmane.emacs.bugs Subject: bug#49261: Segfault during loadup Date: Wed, 14 Jul 2021 09:42:53 +0200 Message-ID: <87lf69e3ya.fsf@igel.home> References: <87pmvum54p.fsf@gnus.org> <87v95mf2lj.fsf@gmx.de> <87pmvt3ob1.fsf@gnus.org> <83r1g9evoy.fsf@gnu.org> <83pmvtevgg.fsf@gnu.org> <87czrt3mj4.fsf@gnus.org> <878s2h3m1d.fsf@gnus.org> <874kd53lnl.fsf@gnus.org> <87zgux26ab.fsf@gnus.org> <87pmvt25uq.fsf@gnus.org> <87lf6h2294.fsf@gnus.org> <87h7h51x9y.fsf_-_@gnus.org> <83bl79b17n.fsf@gnu.org> <835yxgc1pm.fsf@gnu.org> <83wnpvag6z.fsf@gnu.org> <5608bf0a-7211-73a9-690f-c869a1cb3c9d@cs.ucla.edu> <83o8b7a5ow.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="13263"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) Cc: larsi@gnus.org, 49261@debbugs.gnu.org To: Paul Eggert Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Jul 14 09:43:10 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 1m3ZXx-0003Ex-RD for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 14 Jul 2021 09:43:09 +0200 Original-Received: from localhost ([::1]:59172 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m3ZXw-0005Xr-PD for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 14 Jul 2021 03:43:08 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:42762) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m3ZXq-0005Xj-Pg for bug-gnu-emacs@gnu.org; Wed, 14 Jul 2021 03:43:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:59440) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1m3ZXq-0002sE-IQ for bug-gnu-emacs@gnu.org; Wed, 14 Jul 2021 03:43:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1m3ZXq-0005r1-HK for bug-gnu-emacs@gnu.org; Wed, 14 Jul 2021 03:43:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Andreas Schwab Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 14 Jul 2021 07:43:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 49261 X-GNU-PR-Package: emacs Original-Received: via spool by 49261-submit@debbugs.gnu.org id=B49261.162624858022496 (code B ref 49261); Wed, 14 Jul 2021 07:43:02 +0000 Original-Received: (at 49261) by debbugs.gnu.org; 14 Jul 2021 07:43:00 +0000 Original-Received: from localhost ([127.0.0.1]:42753 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1m3ZXo-0005ql-GD for submit@debbugs.gnu.org; Wed, 14 Jul 2021 03:43:00 -0400 Original-Received: from mail-out.m-online.net ([212.18.0.10]:37008) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1m3ZXm-0005qc-7C for 49261@debbugs.gnu.org; Wed, 14 Jul 2021 03:42:58 -0400 Original-Received: from frontend01.mail.m-online.net (unknown [192.168.8.182]) by mail-out.m-online.net (Postfix) with ESMTP id 4GPqH41LkCz1sCwg; Wed, 14 Jul 2021 09:42:55 +0200 (CEST) Original-Received: from localhost (dynscan1.mnet-online.de [192.168.6.70]) by mail.m-online.net (Postfix) with ESMTP id 4GPqH333ZJz1qtH6; Wed, 14 Jul 2021 09:42:55 +0200 (CEST) X-Virus-Scanned: amavisd-new at mnet-online.de Original-Received: from mail.mnet-online.de ([192.168.8.182]) by localhost (dynscan1.mail.m-online.net [192.168.6.70]) (amavisd-new, port 10024) with ESMTP id 1Y7_Htlo9htZ; Wed, 14 Jul 2021 09:42:54 +0200 (CEST) X-Auth-Info: CFakBnF4/YvEs7Uhan6xIdFRp3hJ/6UKYYgbStA4twu+30/rmJocarUmwyvssPiG Original-Received: from igel.home (ppp-46-244-191-35.dynamic.mnet-online.de [46.244.191.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.mnet-online.de (Postfix) with ESMTPSA; Wed, 14 Jul 2021 09:42:54 +0200 (CEST) Original-Received: by igel.home (Postfix, from userid 1000) id 040522C0EBE; Wed, 14 Jul 2021 09:42:53 +0200 (CEST) X-Yow: The PINK SOCKS were ORIGINALLY from 1952!! But they went to MARS around 1953!! In-Reply-To: (Paul Eggert's message of "Tue, 13 Jul 2021 18:12:00 -0500") 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:209906 Archived-At: On Jul 13 2021, Paul Eggert wrote: > However, there is no overflow here: > > unsigned a = -1, b = INT_MIN, c = LLONG_MAX; > > and these declarations have well-defined behavior in C, This is a bogus argument. You can write total bullshit by using only well-defined C. And assinging a wider constant to a narrow object, losing bits, is likely hiding a bug. Andreas. -- Andreas Schwab, schwab@linux-m68k.org GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1 "And now for something completely different."