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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++/105406] [11/12 Regression] coroutines: since 11.3 co_await
 attempts to copy a move-only value when await_transform(T &) exists
Date: Tue, 18 Apr 2023 20:45:56 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105406

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

https://gcc.gnu.org/g:6fd32842404ac1a3cd98189f61d93c5bc9c8680c

commit r12-9435-g6fd32842404ac1a3cd98189f61d93c5bc9c8680c
Author: Jason Merrill <jason@redhat.com>
Date:   Wed Mar 15 17:02:15 2023 -0400

    c++: co_await and move-only type [PR105406]

    Here we were building a temporary MoveOnlyAwaitable to hold the result =
of
    evaluating 'o', but since 'o' is an lvalue we should build a reference
    instead.

            PR c++/105406

    gcc/cp/ChangeLog:

            * coroutines.cc (build_co_await): Handle lvalue 'o'.

    gcc/testsuite/ChangeLog:

            * g++.dg/coroutines/co-await-moveonly1.C: New test.=