From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 024AC3858C50; Sat, 27 Apr 2024 00:13:16 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 024AC3858C50 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1714176797; bh=qeFBvZUUMqlvcBy9LUlXYmQeMQSt04BQEPjArtCft2c=; h=From:To:Subject:Date:In-Reply-To:References:From; b=RWn2K9+9Ib38gZYdNL5+p1y+oDUIh0tGHyJna+QfaQgqC1EMZ+jMjivQPpwid4HCN 0JM+6+2iuC/ZL04PborlA4QFYAJvVrfpYcGObc2HuwPQd8I50e+SShKreGbRzc568s aXQiwm12eTyphUKnt9ZjVxRKqmODLTDdLKOKH2vw= From: "pdimov at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/114865] [13/14/15 Regression] std::atomic::compare_exchange_strong seems to hang under GCC 13 on Ubuntu 23.04 Date: Sat, 27 Apr 2024 00:13:16 +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: 13.2.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: pdimov at gmail dot com X-Bugzilla-Status: WAITING X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 13.3 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=3D114865 --- Comment #4 from Peter Dimov --- This https://raw.githubusercontent.com/boostorg/uuid/feature/gcc_pr_114865/test/= test_gcc_pr114865.cpp exhibits the problem for me on GCC 13/14. I'm only seeing the hang with -std=3Dc++11 -m32 in the CI run because this combination is tested first, b= ut I believe it's independent of standard level and address model.=