[Bug c++/95477] [coroutines] coroutine result object not properly freed

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95477

--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Iain D Sandoe
<iains@gcc.gnu.org>:

https://gcc.gnu.org/g:d9b3aa517bdab280bbde2a80a80a77ad7333a0cb

commit r10-8369-gd9b3aa517bdab280bbde2a80a80a77ad7333a0cb
Author: Iain Sandoe <iain@sandoe.co.uk>
Date:   Thu Jun 25 14:33:23 2020 +0100

    coroutines: Add a cleanup expression for g-r-o when needed [PR95477].

    The PR reports that we fail to destroy the object initially created from
    the get-return-object call.  Fixed by adding a cleanup when the DTOR is
    non-trivial.  In addition, to meet the specific wording that the call to
    get_return_object creates the glvalue for the return, we must construct
    that in-place in the return object to avoid a second copy/move CTOR.

    gcc/cp/ChangeLog:

            PR c++/95477
            * coroutines.cc (morph_fn_to_coro): Apply a cleanup to
            the get return object when the DTOR is non-trivial.

    gcc/testsuite/ChangeLog:

            PR c++/95477
            * g++.dg/coroutines/pr95477.C: New test.
            * g++.dg/coroutines/void-gro-non-class-coro.C: New test.

    (cherry picked from commit 788b962aa00959e861b45767c5c88ec41ca30c21)