test_submit_func_globals (test.test_concurrent_futures.test_interpreter_pool.InterpreterPoolExecutorTest.test_submit_func_globals) ... 1.43s Warning -- threading_cleanup() failed to clean up threads in 1.0 seconds Warning -- before: thread count=0, dangling=1 Warning -- after: thread count=1, dangling=2 Warning -- Dangling thread: <_MainThread(MainThread, started 7931990784)> Warning -- Dangling thread: test.test_concurrent_futures.test_interpreter_pool leaked [0, 0, 1] memory blocks, sum=1 (this is fine) Re-running test.test_concurrent_futures.test_interpreter_pool in verbose mode FAIL: test_free_reference (test.test_concurrent_futures.test_interpreter_pool.InterpreterPoolExecutorTest.test_free_reference)