Bug in boost::threads sample

[morehate@…]

Good day.

Boost::threads has example "conditions.cpp" in boost\libs\thread\example folder.

This sample has problems with synchronyzation between output streams:

void sender() {
...
        std::cout << "sent: " << n << std::endl; // <-- There isn't synchronyzation
...
}
void receiver() {
...
        std::cout << "received: " << n << std::endl;  // <-- There isn't synchronyzation
...
}

So the result of this sample looks like this:

received: 96
received: sent: 97 // <--
sent: 98
sent: 99
97 // <--
received: 98

I think this is very strange for multithreads synchronization sample ;).