{

std::cout << "foo" << std::endl;

p->set_value(123); // This line locks the future's mutex, then calls the continuation with the mutex already locked.

{

try {

std::cout << "bar" << std::endl;

int i = fooResult.get(); // Code hangs on this line (Due to future already being locked by the set_value call)

std::cout << "i: " << i << std::endl;

} catch(...) {

std::cout << __FILE__ << ":" << __LINE__ << std::endl;

}

{

std::cout << __FILE__ << ":" << __LINE__ << std::endl;

try {

IntPromise p(new boost::promise<int>());

boost::thread t(boost::bind(foo, p));

boost::future<int> f1 = p->get_future();

f1.then(boost::launch::deferred, &bar);

t.join();

} catch(...) {

return 1;

}

std::cout << __FILE__ << ":" << __LINE__ << std::endl;

try {

IntPromise p(new boost::promise<int>());

boost::thread t(boost::bind(foo, p));

boost::future<int> f1 = p->get_future();

f1.then(boost::launch::async, &bar);

t.join();

} catch(...) {

return 2;

}

std::cout << __FILE__ << ":" << __LINE__ << std::endl;