From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id AF5B73858C74; Fri, 3 Feb 2023 01:40:56 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org AF5B73858C74 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1675388456; bh=xyXsP/T0a/ZUwrXXkpwkvfAwcHX0Zox0SJrnDGO4dD4=; h=From:To:Subject:Date:In-Reply-To:References:From; b=MZ3lRDZ3CDzhROtN7EIpA8FhIs7D3F0cBinJQBoQC4uonJI++X2FmEYFCXCrO5m63 GZMUD89yTx/n4Y+BInIUyDkYqMITg6XD2S/tBB85/qaOfQyOdF55ufhV6QMl2EejS+ dnT0YlgssuiHsJLtupGVXojl+tD+UO/5ObuUl6wQ= From: "pinskia at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/108645] Change in behavior, std::accumulate doesn't always work as expected in C++20 builds Date: Fri, 03 Feb 2023 01:40:56 +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: unknown X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: pinskia at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: 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: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108645 --- Comment #2 from Andrew Pinski --- >Tested with both clang and gcc trunk, so it seems to be a library level is= sue. I tested clang with -stdlib=3Dlibc++ and it produces the same results as wi= thout that option (which is it uses gcc's libstdc++v3) so it might not be a libra= ry level issue. https://godbolt.org/z/1qhjMKWhG=