From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
 id 75FC6386EC66; Mon, 29 Mar 2021 20:04:34 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 75FC6386EC66
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/96592] [10 Regression] Tuple element w/ member
 reference to incomplete template type rejected
Date: Mon, 29 Mar 2021 20:04:34 +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: rejects-valid
X-Bugzilla-Severity: normal
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: ppalka at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 10.3
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-96592-4-xZOGZ7cKtf@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-96592-4@http.gcc.gnu.org/bugzilla/>
References: <bug-96592-4@http.gcc.gnu.org/bugzilla/>
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 <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <https://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <https://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Mon, 29 Mar 2021 20:04:34 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96592

--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Jonathan Wakely
<redi@gcc.gnu.org>:

https://gcc.gnu.org/g:202e96058031b8ac2edc8fdab2faab06b988a253

commit r10-9607-g202e96058031b8ac2edc8fdab2faab06b988a253
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Thu Sep 3 16:26:16 2020 +0100

    libstdc++: Add workaround for weird std::tuple error [PR 96592]

    This "fix" makes no sense, but it avoids an error from G++ about
    std::is_constructible being incomplete. The real problem is elsewhere,
    but this "fixes" the regression for now.

    libstdc++-v3/ChangeLog:

            PR libstdc++/96592
            * include/std/tuple (_TupleConstraints<true, T...>): Use
            alternative is_constructible instead of std::is_constructible.
            * testsuite/20_util/tuple/cons/96592.cc: New test.

    (cherry picked from commit 032a4b42cc5f2105f622690ce2552f1c30e1d227)=