https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104403

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>:

https://gcc.gnu.org/g:1755141a9ea0dddabb52776cddc4c9325eed27c6

commit r12-7112-g1755141a9ea0dddabb52776cddc4c9325eed27c6
Author: Jakub Jelinek <ja...@redhat.com>
Date:   Tue Feb 8 20:15:42 2022 +0100

    c++: Remove superflous assert [PR104403]

    I've added the assert because start_decl diagnoses such vars for C++20 and
    earlier:
      if (current_function_decl && VAR_P (decl)
          && DECL_DECLARED_CONSTEXPR_P (current_function_decl)
          && cxx_dialect < cxx23)
    but as can be seen, we cam trigger the assert in older standards e.g.
during
    non-manifestly constant evaluation.  Rather than refining the assert that
    DECL_EXPRs for such vars don't appear for C++20 and older if they are
inside
    of functions declared constexpr this patch just removes the assert, the
    code rejects encountering those vars in constant expressions anyway.

    2022-02-08  Jakub Jelinek  <ja...@redhat.com>

            PR c++/104403
            * constexpr.cc (cxx_eval_constant_expression): Don't assert
DECL_EXPRs
            of TREE_STATIC vars may only appear in -std=c++23.

            * g++.dg/cpp0x/lambda/lambda-104403.C: New test.

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