[Bug c++/123837] ICE: fails to produce LTO streams when using C++26 annotations

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123837

--- Comment #4 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:5c2a5bfcd4e62daeb7d7f25db088816fd1d54194

commit r16-7101-g5c2a5bfcd4e62daeb7d7f25db088816fd1d54194
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Wed Jan 28 09:48:10 2026 +0100

    free-lang-data: Remove C++ annotations [PR123837]

    As mentioned in the PR and reproduced on the testcase, we ICE during
    LTO streaming because C++ annotation arguments can contain trees LTO
    streaming doesn't handle.
    We don't really need annotations when the FE is done with the whole
    TU, annotations are always TU local and not exposed to the rest and
    used in consteval only stuff, so the following patch just removes
    all annotations at free-lang-data time.

    2026-01-28  Jakub Jelinek  <jakub@redhat.com>

            PR c++/123837
            * ipa-free-lang-data.cc (find_decls_types_r): Remove C++
annotations
            from {DECL,TYPE}_ATRIBUTES.

            * g++.dg/reflect/annotations9.C: New test.