[Bug c++/121724] Bad file data error on modules with nested namespace that does not match with global module fragment

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121724

--- Comment #2 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Nathaniel Shead <nsh...@gcc.gnu.org>:

https://gcc.gnu.org/g:03505e5b93e635907ed5ef7edac11da4026655e2

commit r16-3558-g03505e5b93e635907ed5ef7edac11da4026655e2
Author: Nathaniel Shead <nathanielosh...@gmail.com>
Date:   Mon Sep 1 21:28:03 2025 +1000

    c++/modules: Mark implicit inline namespaces as purview [PR121724]

    When we push an existing namespace within the module purview for the
    first time, we also need to mark any parent inline namespaces as purview
    to not confuse the streaming logic.

            PR c++/121724

    gcc/cp/ChangeLog:

            * name-lookup.cc (push_namespace): Mark inline namespace
            contexts as purview if needed.

    gcc/testsuite/ChangeLog:

            * g++.dg/modules/namespace-12_a.C: New test.
            * g++.dg/modules/namespace-12_b.C: New test.

    Signed-off-by: Nathaniel Shead <nathanielosh...@gmail.com>