#include <thread>

void
some_function()
{
}

void
some_other_function(int)
{
}

std::thread
f()
{
  void some_function();
  return std::thread(some_function);
}
std::thread
g()
{
  void some_other_function(int);
  std::thread t(some_other_function, 42);
  return t;
}

int
main()
{
  std::thread t1 = f();
  t1.join();
  std::thread t2 = g();
  t2.join();
}