From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 18641 invoked by alias); 10 Feb 2014 19:00:46 -0000 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 Received: (qmail 18599 invoked by uid 48); 10 Feb 2014 19:00:43 -0000 From: "redi at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/59603] std::random_shuffle tries to swap element with itself Date: Mon, 10 Feb 2014 19:00:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: libstdc++ X-Bugzilla-Version: 4.8.2 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: redi at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2014-02/txt/msg00989.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59603 --- Comment #5 from Jonathan Wakely --- Even if swapping an object with itself is well-defined it's a waste of time, so we shouldn't do it. There's a discussion happening now with the C++ library working group to resolve whether self-move-assignment is user error or supposed to be allowed (i.e. whether the debug mode assertion is ok or not)