From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 12825 invoked by alias); 12 Jun 2012 15:50:29 -0000 Received: (qmail 12804 invoked by uid 22791); 12 Jun 2012 15:50:27 -0000 X-SWARE-Spam-Status: No, hits=-4.3 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,KHOP_THREADED,TW_CX X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Tue, 12 Jun 2012 15:50:07 +0000 From: "redi at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/53646] Surprising effects of cxx11 vs cxx98 ABI compatibility Date: Tue, 12 Jun 2012 15:50:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: libstdc++ X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: redi at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2012-06/txt/msg00707.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53646 --- Comment #7 from Jonathan Wakely 2012-06-12 15:50:05 UTC --- Trivially copyable is just one small part of the POD requirements. std::pair has always been non-POD, even in c++98, but in c++98 it is trivially copyable, in c++11 that move constructor is non-trivial. It can be made trivial by changing it to: pair(pair&& __p) noexcept(__and_, is_nothrow_move_constructible<_T2>>::value) = default; That might fix this problem, could you test it?