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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/106695] [11/12 Regression] Explicit copy constructor
 does not work for a parameter passed via std::async
Date: Wed, 07 Sep 2022 14:16:13 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106695

--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Jonathan Wakely
<redi@gcc.gnu.org>:

https://gcc.gnu.org/g:47f0bd269403762ddb71b8c6165b30ace4f70a8b

commit r12-8747-g47f0bd269403762ddb71b8c6165b30ace4f70a8b
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Mon Aug 22 15:42:17 2022 +0100

    libstdc++: Fix for explicit copy ctors in <thread> and <future> [PR1066=
95]

    When I changed std::thread and std::async to avoid unnecessary move
    construction of temporaries, I introduced a regression where types with
    an explicit copy constructor could not be passed to std::thread or
    std::async. The fix is to add a constructor instead of using aggregate
    initialization of an unnamed temporary.

    libstdc++-v3/ChangeLog:

            PR libstdc++/106695
            * include/bits/std_thread.h (thread::_State_impl): Forward
            individual arguments to _Invoker constructor.
            (thread::_Invoker): Add constructor. Delete copies.
            * include/std/future (__future_base::_Deferred_state): Forward
            individual arguments to _Invoker constructor.
            (__future_base::_Async_state_impl): Likewise.
            * testsuite/30_threads/async/106695.cc: New test.
            * testsuite/30_threads/thread/106695.cc: New test.

    (cherry picked from commit 5abe0657553580bd1b7488dd84d55138a8d9f23c)=