From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Ken Brown Newsgroups: gmane.emacs.bugs Subject: bug#32189: 27.0.50; GCC 7 warning due to -Wformat-truncation=2 Date: Thu, 19 Jul 2018 08:49:33 -0400 Message-ID: References: <031d18cf-e661-6dea-8882-38d75924d0d4@cornell.edu> <83601c4m37.fsf@gnu.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit X-Trace: blaine.gmane.org 1532004491 6056 195.159.176.226 (19 Jul 2018 12:48:11 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 19 Jul 2018 12:48:11 +0000 (UTC) User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 Cc: 32189@debbugs.gnu.org To: Philipp Stephani Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Jul 19 14:48:07 2018 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fg8Ln-0001TQ-2k for geb-bug-gnu-emacs@m.gmane.org; Thu, 19 Jul 2018 14:48:07 +0200 Original-Received: from localhost ([::1]:42273 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fg8Nu-0001UY-0l for geb-bug-gnu-emacs@m.gmane.org; Thu, 19 Jul 2018 08:50:18 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:44350) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fg8Nk-0001S2-Qh for bug-gnu-emacs@gnu.org; Thu, 19 Jul 2018 08:50:09 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fg8Nf-0000kN-Vd for bug-gnu-emacs@gnu.org; Thu, 19 Jul 2018 08:50:08 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:42601) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fg8Nf-0000kD-Pn for bug-gnu-emacs@gnu.org; Thu, 19 Jul 2018 08:50:03 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1fg8Nf-0001ki-7A for bug-gnu-emacs@gnu.org; Thu, 19 Jul 2018 08:50:03 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Ken Brown Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 19 Jul 2018 12:50:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 32189 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 32189-submit@debbugs.gnu.org id=B32189.15320045866708 (code B ref 32189); Thu, 19 Jul 2018 12:50:01 +0000 Original-Received: (at 32189) by debbugs.gnu.org; 19 Jul 2018 12:49:46 +0000 Original-Received: from localhost ([127.0.0.1]:47619 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fg8NM-0001k6-UC for submit@debbugs.gnu.org; Thu, 19 Jul 2018 08:49:46 -0400 Original-Received: from limerock01.mail.cornell.edu ([128.84.13.241]:37836) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fg8NK-0001js-Lx for 32189@debbugs.gnu.org; Thu, 19 Jul 2018 08:49:42 -0400 X-CornellRouted: This message has been Routed already. Original-Received: from authusersmtp.mail.cornell.edu (granite4.serverfarm.cornell.edu [10.16.197.9]) by limerock01.mail.cornell.edu (8.14.4/8.14.4_cu) with ESMTP id w6JCnagg015268; Thu, 19 Jul 2018 08:49:36 -0400 Original-Received: from [192.168.0.15] (mta-68-175-129-7.twcny.rr.com [68.175.129.7] (may be forged)) (authenticated bits=0) by authusersmtp.mail.cornell.edu (8.14.4/8.12.10) with ESMTP id w6JCnYfB029920 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT); Thu, 19 Jul 2018 08:49:35 -0400 In-Reply-To: Content-Language: en-US X-PMX-Cornell-Gauge: Gauge=XXXXX X-PMX-CORNELL-AUTH-RESULTS: dkim-out=none; 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: 208.118.235.43 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:148667 Archived-At: On 7/19/2018 2:10 AM, Philipp Stephani wrote: > Ken Brown > schrieb am > Mi., 18. Juli 2018 um 21:44 Uhr: > $ cat test.c > #include > int > main () > { >    char buffer[16]; >    short a; >    snprintf (buffer, 16, "%3.1f", a); > } > > > This is undefined behavior, as %f requires a double argument. Then cast the argument to double; this doesn't change the warning, which claims that the output could be 312 bytes. Ken