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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/112876] ranges:to: c.end() is unnecessarily assigned
 by the return value of c.emplace()
Date: Sat, 09 Dec 2023 14:06:51 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112876

--- Comment #5 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jonathan Wakely <redi@gcc.gnu.org>:

https://gcc.gnu.org/g:a314edee2490259d7f7caec8eef77846bcdb608b

commit r14-6357-ga314edee2490259d7f7caec8eef77846bcdb608b
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri Dec 8 13:47:04 2023 +0000

    libstdc++: Fix resolution of LWG 4016 for std::ranges::to [PR112876]

    What I implemented in r14-6199-g45630fbcf7875b does not match what I
    proposed for LWG 4016, and it imposes additional, unwanted requirements
    on the emplace and insert member functions of the container being
    populated.

    libstdc++-v3/ChangeLog:

            PR libstdc++/112876
            * include/std/ranges (ranges::to): Do not try to use an iterator
            returned by the container's emplace or insert member functions.
            * testsuite/std/ranges/conv/1.cc (Cont4::emplace, Cont4::insert=
):
            Use the iterator parameter. Do not return an iterator.=