A `BrokenPipeError` exception is raised when the queue thread of a `multiprocessing.Queue` still sends enqueued items to the write end of the queue pipe *after* the read end of the queue pipe has been [automatically closed during its garbage collection](https://docs.python.org/3/library/socket.html#socket.socket.close) following the garbage collection of the queue (the write end of the queue pipe is not garbage collected because it is also referenced by the queue thread):

```
import multiprocessing

def main():
    q = multiprocessing.Queue()
    q.put(0)

if __name__ == '__main__':
    main()
```