oneshot has potential Use After Free when used asynchronously
There is a race condition that can lead to a use-after-free if a oneshot::Receiver is polled but then dropped instead of polled to completion. This could happen if the receiver future was cancelled while receiving, for example by being wrapped in a timeout future or similar. When the Receiver is polled (Future::poll) it writes a waker to the channel and sets it to the RECEIVING state. If the Receiver was …