bpo-33676: Fix dangling thread in _test_multiprocessing (GH-10755)


Fix WithThreadsTestPool.test_wrapped_exception()
of test_multiprocessing_fork: join the pool.

WithThreadsTestPool.test_del_pool() is now also decorated
with @support.reap_threads.
(cherry picked from commit b7278736b3ae158a7738057e3045bc767ced019e)

Co-authored-by: Victor Stinner <vstinner@redhat.com>
1 file changed