From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 026DC3858D35; Mon, 27 Jul 2020 07:11:11 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 026DC3858D35 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1595833872; bh=5G3hB3a8uKfW0YYGyjpJnrR3zpMrKBkYCVcmYz8Q8zw=; h=From:To:Subject:Date:In-Reply-To:References:From; b=t+zbrkH8TkuK0in0WM+ak/FFZJqWPgLksYyL2trQr0usVRCNL2/aXiXxwu5NDNgYE nQJy2nNW82uPy2JGJcA0xOxCEv6VLfmDq8/5sfei1/2noIJ5uCyaSC7mgzZj4AqQm5 4J824NCj5UsnSQfzRwUBjdWg800qf5lKPxaETMjg= From: "marxin at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/96311] false positive for -Wunused-but-set-variable (const/constexpr identifier used in generic lambda) Date: Mon, 27 Jul 2020 07:11:11 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Version: 11.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: marxin at gcc dot gnu.org 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: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: everconfirmed cc cf_reconfirmed_on bug_status 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: Mon, 27 Jul 2020 07:11:12 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96311 Martin Li=C5=A1ka changed: What |Removed |Added ---------------------------------------------------------------------------- Ever confirmed|0 |1 CC| |marxin at gcc dot gnu.org Last reconfirmed| |2020-07-27 Status|UNCONFIRMED |WAITING --- Comment #1 from Martin Li=C5=A1ka --- Confirmed, but it seems the code is rejected with clang: pr96311.c:6:10: error: variable 'used' cannot be implicitly captured in a lambda with no capture-default specified return used; ^ pr96311.c:3:16: note: 'used' declared here constexpr int used =3D 0; ^ pr96311.c:4:2: note: lambda expression begins here [](auto unused) ^ pr96311.c:4:2: warning: expression result unused [-Wunused-value] [](auto unused) ^~~~~~~~~~~~~~~ 2 warnings and 1 error generated. Is it a valid test-case?=