[PATCH] libstdc++: Fix recent flat_map test with COW string

[Jonathan Wakely]

On Thu, 21 May 2026 at 19:24, Patrick Palka <ppalka@redhat.com> wrote:
>
> Tested on x86_64-pc-linux-gnu with --target_board=unix/-D_GLIBCXX_USE_CXX11_ABI=0
> OK for trunk and 16?

OK for both, thanks for the quick fix.


>
> -- >8 --
>
> libstdc++-v3/ChangeLog:
>
>         * testsuite/23_containers/flat_map/1.cc (test_constexpr):
>         If std::string isn't constexpr don't run test10.
> ---
>  libstdc++-v3/testsuite/23_containers/flat_map/1.cc | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/libstdc++-v3/testsuite/23_containers/flat_map/1.cc b/libstdc++-v3/testsuite/23_containers/flat_map/1.cc
> index 096b9eeac3e4..1cb088f511eb 100644
> --- a/libstdc++-v3/testsuite/23_containers/flat_map/1.cc
> +++ b/libstdc++-v3/testsuite/23_containers/flat_map/1.cc
> @@ -330,7 +330,9 @@ test_constexpr()
>    test07();
>    test08();
>    test09();
> +#if __cpp_lib_constexpr_string >= 201907L
>    test10();
> +#endif
>    return true;
>  }
>
> --
> 2.54.0.rc1.54.g60f07c4f5c
>