From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-Status: No, score=-4.2 required=3.0 tests=AWL,BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, RCVD_IN_DNSWL_MED,RCVD_IN_MSPIKE_H4,RCVD_IN_MSPIKE_WL,SPF_HELO_PASS, SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dcvr.yhbt.net (Postfix) with ESMTPS id AEA1F1F4B4 for ; Fri, 8 Jan 2021 22:00:45 +0000 (UTC) Received: from localhost ([::1]:39192 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kxzoK-00023o-EO for normalperson@yhbt.net; Fri, 08 Jan 2021 17:00:44 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:44942) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kxzoH-00023e-EA for bug-gnulib@gnu.org; Fri, 08 Jan 2021 17:00:41 -0500 Received: from zimbra.cs.ucla.edu ([131.179.128.68]:41746) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kxzoB-0003N3-53 for bug-gnulib@gnu.org; Fri, 08 Jan 2021 17:00:40 -0500 Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 19FA4160089; Fri, 8 Jan 2021 14:00:31 -0800 (PST) Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id omR-mz5pZBtt; Fri, 8 Jan 2021 14:00:30 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 731C116008F; Fri, 8 Jan 2021 14:00:30 -0800 (PST) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id OVKMehveHabI; Fri, 8 Jan 2021 14:00:30 -0800 (PST) Received: from [192.168.1.9] (cpe-23-243-218-95.socal.res.rr.com [23.243.218.95]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 4F974160089; Fri, 8 Jan 2021 14:00:30 -0800 (PST) Subject: Re: parse-datetime.y reports integer overflow when compiled with gcc 5.5.0 To: Bruno Haible References: <20210108163702.27423@ulysses.gnu.org.ua> <2033444.Lg13QqV72K@omega> From: Paul Eggert Organization: UCLA Computer Science Department Message-ID: <2e13b5f4-e503-2cc3-b97f-386cdd239089@cs.ucla.edu> Date: Fri, 8 Jan 2021 14:00:30 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.5.0 MIME-Version: 1.0 In-Reply-To: <2033444.Lg13QqV72K@omega> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=131.179.128.68; envelope-from=eggert@cs.ucla.edu; helo=zimbra.cs.ucla.edu X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, NICE_REPLY_A=-0.241, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: bug-gnulib@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Gnulib discussion list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: bug-gnulib@gnu.org Errors-To: bug-gnulib-bounces+normalperson=yhbt.net@gnu.org Sender: "bug-gnulib" On 1/8/21 1:49 PM, Bruno Haible wrote: > So, the problem is a signed-integer overflow of constants in a dead > (unreachable) code branch. Yes, I get many warnings like that in Oracle Developer Studio too, with some of the Gnulib tests. Either ignore the warnings, or don't use -Woverflow, or (as we did with GCC) get your compiler fixed.