On Mon, 12 Sep 2022, 17:46 Patrick Palka via Libstdc++, <
libstdc++@gcc.gnu.org> wrote:

> Although PR106320 only affected the 10 and 11 branches, and the testcase
> from there was already correctly accepted on trunk and the 12 branch, we
> should also add the testcase to 12/trunk for inter-branch consistency.
>
> Tested on x86_64-pc-linux-gnu, does this look OK for trunk/12?
>

Yes, good idea to add this.



>         PR libstdc++/106320
>
> libstdc++-v3/ChangeLog:
>
>         * testsuite/std/ranges/adaptors/join.cc (test13): New test.
> ---
>  libstdc++-v3/testsuite/std/ranges/adaptors/join.cc | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
>
> diff --git a/libstdc++-v3/testsuite/std/ranges/adaptors/join.cc
> b/libstdc++-v3/testsuite/std/ranges/adaptors/join.cc
> index 8986f718229..530ab6663b5 100644
> --- a/libstdc++-v3/testsuite/std/ranges/adaptors/join.cc
> +++ b/libstdc++-v3/testsuite/std/ranges/adaptors/join.cc
> @@ -205,6 +205,18 @@ test12()
>    }();
>  }
>
> +void
> +test13()
> +{
> +  // PR libstdc++/106320
> +  auto l = std::views::transform([](auto x) {
> +    return x | std::views::transform([i=0](auto y) {
> +      return y;
> +    });
> +  });
> +  std::vector<std::vector<int>> v{{5, 6, 7}};
> +  v | l | std::views::join;
> +}
>  int
>  main()
>  {
> @@ -220,4 +232,5 @@ main()
>    test10();
>    test11();
>    test12();
> +  test13();
>  }
> --
> 2.37.3.542.gdd3f6c4cae
>
>