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

https://gcc.gnu.org/g:788b962aa00959e861b45767c5c88ec41ca30c21

commit r11-1613-g788b962aa00959e861b45767c5c88ec41ca30c21
Author: Iain Sandoe <i...@sandoe.co.uk>
Date:   Tue Jun 23 10:06:21 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.