// #include <boost/coroutine/all.hpp>
#include <boost/coroutine2/all.hpp>
#include <iostream>

int main()
{
    // using coro_t = boost::coroutines::coroutine<void>; // fine
    using coro_t = boost::coroutines2::coroutine<void>; // bug

    coro_t::push_type sink(
        [](coro_t::pull_type& source) {
        // Shouldn't reach here without a call to sink()!
        std::cout << "coroutine entered\n";
    });
}