../libs/core/execution/tests/unit/algorithm_on.cpp:144:22: warning: unused parameter 'vals' [-Wunused-parameter]
        const Ts&... vals) noexcept
                     ^
../libs/core/execution/tests/unit/algorithm_on.cpp:189:19: error: no matching function for call to object of type 'const struct connect_t'
        auto op = ex::connect(std::move(snd), expect_value_receiver{13});
                  ^~~~~~~~~~~
../libs/core/tag_invoke/include/hpx/functional/detail/tag_fallback_invoke.hpp:275:60: note: candidate template ignored: requirement 'is_tag_invocable_v<hpx::execution::experimental::connect_t, hpx::execution::experimental::detail::on_sender<inline_scheduler, hpx::type_identity<hpx::execution::experimental::detail::just_sender<hpx::execution::experimental::set_value_t, hpx::util::pack_c<unsigned long, 0>, int>>>::type &&, expect_value_receiver<hpx::execution::experimental::exec_envs::empty_env, int> &&>' was not satisfied [with Args = <hpx::execution::experimental::detail::on_sender<inline_scheduler, hpx::type_identity<hpx::execution::experimental::detail::just_sender<hpx::execution::experimental::set_value_t, hpx::util::pack_c<unsigned long, 0>, int>>>::type, expect_value_receiver<hpx::execution::experimental::exec_envs::empty_env, int>>]
            HPX_HOST_DEVICE HPX_FORCEINLINE constexpr auto operator()(
                                                           ^
../libs/core/tag_invoke/include/hpx/functional/detail/tag_fallback_invoke.hpp:290:60: note: candidate template ignored: substitution failure [with Args = <hpx::execution::experimental::detail::on_sender<inline_scheduler, hpx::type_identity<hpx::execution::experimental::detail::just_sender<hpx::execution::experimental::set_value_t, hpx::util::pack_c<unsigned long, 0>, int>>>::type, expect_value_receiver<hpx::execution::experimental::exec_envs::empty_env, int>>, $1 = void]: no type named 'type' in 'hpx::util::invoke_result<const hpx::functional::detail::tag_fallback_invoke_t_ns::tag_fallback_invoke_t, hpx::execution::experimental::connect_t, hpx::execution::experimental::detail::on_sender<inline_scheduler, hpx::type_identity<hpx::execution::experimental::detail::just_sender<hpx::execution::experimental::set_value_t, hpx::util::pack_c<unsigned long, 0>, int>>>::type &&, expect_value_receiver<hpx::execution::experimental::exec_envs::empty_env, int> &&>'
            HPX_HOST_DEVICE HPX_FORCEINLINE constexpr auto operator()(
                                                           ^
1 warning and 1 error generated.
ninja: build stopped: subcommand failed.