When implementing futures manually, a common mistake is to return a Poll::Pending without arranging for a Waker to be notified in the future. Do we have a short name for this issue, a-la "lost wakeup"? Strictly speaking, this is not a "lost wakeup" problem -- rather than missing a wakeup notification, you don't emit wakeup at al, it's more akin to lost alarm clock.
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