After fffabd53482f34f96ab9273486538f587e3d91fc, the v2 and v3 versions produce poison instead of undef. Also adjust the v1 version, as well as the test expectations, to make the example pass again.
After fffabd53482f34f96ab9273486538f587e3d91fc, the v2 and v3 versions produce poison instead of undef. Also adjust the v1 version, as well as the test expectations, to make the example pass again.