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thread_pool::wait doesn't appear to do what it says it does #443

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@tsr-boxbot

Hi, I'm trying to understand the behavior of thread_pool::wait, the documentation (Boost 1.83) says:

This function blocks until the threads in the pool have completed. If stop() is not called prior to wait(), the wait() call will wait until the pool has no more outstanding work.

Source: https://www.boost.org/doc/libs/1_83_0/doc/html/boost_asio/reference/thread_pool/wait.html

If I have something like:

boost::asio::thread_pool thread_pool(10);
...
boost::asio::post(thread_pool_, task0);
....
thread_pool.wait(); //stop was not called so should just wait until the pool has no more outstanding work.
boost::asio::post(thread_pool_, task9999); // hangs forever

Since I didn't call stop I would expect to be able to post more things to the pool but it appears wait actually shutdowns the pool even if stop was not called.

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