From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: Opportunistic garbage collection Date: Thu, 25 Apr 2019 20:15:48 -0400 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="62164"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) Cc: emacs-devel@gnu.org To: Paul Eggert Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Apr 26 02:16:44 2019 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hJoXg-000G01-QZ for ged-emacs-devel@m.gmane.org; Fri, 26 Apr 2019 02:16:40 +0200 Original-Received: from localhost ([127.0.0.1]:37023 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hJoXf-0004U6-OY for ged-emacs-devel@m.gmane.org; Thu, 25 Apr 2019 20:16:39 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:57216) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hJoX4-0004Tu-AA for emacs-devel@gnu.org; Thu, 25 Apr 2019 20:16:03 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hJoX3-0006oC-Gs for emacs-devel@gnu.org; Thu, 25 Apr 2019 20:16:02 -0400 Original-Received: from pruche.dit.umontreal.ca ([132.204.246.22]:59752) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hJoX2-0006kh-Iw for emacs-devel@gnu.org; Thu, 25 Apr 2019 20:16:00 -0400 Original-Received: from pastel.home (lechon.iro.umontreal.ca [132.204.27.242]) by pruche.dit.umontreal.ca (8.14.7/8.14.1) with ESMTP id x3Q0Fm61020616; Thu, 25 Apr 2019 20:15:49 -0400 Original-Received: by pastel.home (Postfix, from userid 20848) id 8047D6AE5D; Thu, 25 Apr 2019 20:15:48 -0400 (EDT) In-Reply-To: (Paul Eggert's message of "Thu, 25 Apr 2019 15:14:16 -0700") X-NAI-Spam-Flag: NO X-NAI-Spam-Threshold: 5 X-NAI-Spam-Score: 0.1 X-NAI-Spam-Rules: 3 Rules triggered GEN_SPAM_FEATRE=0.1, EDT_SA_DN_PASS=0, RV6533=0 X-NAI-Spam-Version: 2.3.0.9418 : core <6533> : inlines <7060> : streams <1819731> : uri <2837101> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 132.204.246.22 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:235942 Archived-At: > And since that's signed integer multiplication, it can overflow with > undefined behavior. Ah, right, so it's not really the size but the sign: it should be EMACS_UINT fact = XFIXNAT (factor); -- Stefan