1 no_coroutine_traits()2void no_coroutine_traits() { 3 co_await 4; // { dg-error {coroutines require a traits template\; cannot find 'std::coroutine_traits'} } 4 } 5 6 // check we have not messed up continuation of the compilation. 7 template <class... Args> 8 struct void_t_imp { 9 using type = void; 10 }; 11