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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 c++/95350] [coroutines] coroutines with move-only by-value
 parameters attempt to copy parameter instead of move it
Date: Mon, 01 Jun 2020 19:25:15 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95350

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Iain D Sandoe <iains@gcc.gnu.org>:

https://gcc.gnu.org/g:88f48e2967ead9be262483618238efa9c7c842ec

commit r11-773-g88f48e2967ead9be262483618238efa9c7c842ec
Author: Iain Sandoe <iain@sandoe.co.uk>
Date:   Mon Jun 1 08:28:35 2020 +0100

    coroutines: Correct handling of references in parm copies [PR95350].

    Adjust to handle rvalue refs the same way as clang, and to correct
    the handling of moves when a copy CTOR is present.  This is one area
    where we could make things easier for the end-user (as was implemented
    before this change), however there needs to be agreement about when the
    full statement containing a coroutine call ends (i.e. when the ramp
    terminates or when the coroutine terminates).

    gcc/cp/ChangeLog:

            PR c++/95350
            * coroutines.cc (struct param_info): Remove rv_ref field.
            (build_actor_fn): Remove specifial rvalue ref handling.
            (morph_fn_to_coro): Likewise.

    gcc/testsuite/ChangeLog:

            PR c++/95350
            * g++.dg/coroutines/torture/func-params-08.C: Adjust test to
            reflect that all rvalue refs are dangling.
            * g++.dg/coroutines/torture/func-params-09-awaitable-parms.C:
            Likewise.
            * g++.dg/coroutines/pr95350.C: New test.=