From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 061513851C1F; Thu, 3 Dec 2020 09:19:42 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 061513851C1F From: "i.hamsa at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/98108] Broken Schwarz counter for iostreams initialization Date: Thu, 03 Dec 2020 09:19:41 +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: 10.2.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: i.hamsa at gmail dot com 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 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 03 Dec 2020 09:19:42 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98108 --- Comment #2 from i.hamsa at gmail dot com --- The standard streams are not user defined objects. They need to be initiali= zed before any user code touches them, before `main`, before everything, no mat= ter what. This is exactly the purpose of the "nifty counter". It works perfectly well in single-threaded environments. The problem is that libstdc++ implementation of it purports to be thread-sa= fe. It isn't.=