From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 118324 invoked by alias); 4 May 2017 22:36:09 -0000 Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org Received: (qmail 118311 invoked by uid 89); 4 May 2017 22:36:08 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD,SPF_HELO_PASS autolearn=ham version=3.3.2 spammy=Hx-languages-length:780, dear, HContent-Transfer-Encoding:8bit X-HELO: mx1.redhat.com Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Thu, 04 May 2017 22:36:06 +0000 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 0F84C804F2; Thu, 4 May 2017 22:36:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 0F84C804F2 Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=palves@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 0F84C804F2 Received: from [127.0.0.1] (ovpn04.gateway.prod.ext.ams2.redhat.com [10.39.146.4]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6753A785DB; Thu, 4 May 2017 22:36:07 +0000 (UTC) Subject: Re: Oh dear. I regret to inform you that commit 'RAII-fy make_cleanup_restore_current_thread & friends' might be unfortunate To: Simon Marchi References: <34792dd0-088c-a1d1-9125-70c8585c21bd@redhat.com> <6bf88edee0fb17451d44b85bb00fb0d0@polymtl.ca> <79511435-a3a8-48f9-2e16-bca8adb1909d@redhat.com> <1fd4bf31-b0cd-3746-36d0-5f9f9e9dce4c@redhat.com> Cc: gdb-patches@sourceware.org From: Pedro Alves Message-ID: Date: Thu, 04 May 2017 22:36:00 -0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 8bit X-SW-Source: 2017-05/txt/msg00129.txt.bz2 On 05/04/2017 10:49 PM, Pedro Alves wrote: > $ /opt/gcc/bin/g++ optional.cc -g3 -O2 -Wmaybe-uninitialized -std=gnu++17 -c > optional.cc: In function ‘void func()’: > optional.cc:28:15: warning: > ‘maybe_a.optional::.optional::::m_dummy’ > may be used uninitialized in this function [-Wmaybe-uninitialized] > ~A () { set (m); } > ~~~~^~~ > optional.cc:41:15: note: > ‘maybe_a.optional::.optional::::m_dummy’ > was declared here > Optional maybe_a; > ^~~~~~~ > > Looks like a compiler bug to me. > Now reported: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80635 Thanks, Pedro Alves