[Bug c++/121068] Placement new of array element is rejected at compile-time

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121068

--- Comment #21 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Jason Merrill <ja...@gcc.gnu.org>:

https://gcc.gnu.org/g:70f33ad677e6350a724b56d4cb766480ed8367fc

commit r16-3333-g70f33ad677e6350a724b56d4cb766480ed8367fc
Author: Jason Merrill <ja...@redhat.com>
Date:   Thu Aug 21 13:52:25 2025 -0400

    c++: constexpr clobber of const [PR121068]

    Since r16-3022, 20_util/variant/102912.cc was failing in C++20 and above
due
    to wrong errors about destruction modifying a const object; destruction is
    OK.

            PR c++/121068

    gcc/cp/ChangeLog:

            * constexpr.cc (cxx_eval_store_expression): Allow clobber of a
const
            object.

    gcc/testsuite/ChangeLog:

            * g++.dg/cpp2a/constexpr-dtor18.C: New test.