#include <utility>
#include <thread>
#include <cstdlib>
#include <unistd.h>
#include <memory>


void foo()
{

}
void bar()
{
    std::unique_ptr<std::thread> p = std::make_unique<std::thread>(foo);
    fork();
    p->join();
}

int main(int argc, char *argv[])
{
    bar();
}