panic: "The Promise Sender was dropped"

[emilk]

poll-promise panics if the user drops the Sender before sending a value.

This is quite a footgun.

A dropped sender is a bug (because we cannot deliver a value), but I'm not sure it deserves a crash.

We could change the interface of Promise to return a Result, with an error for "DroppedSender".

We could also consider having the panic only in debug builds, and in release builds treat a dropped receiver the same as a receiver that hasn't sent anything yet, i.e. the promise will be stuck in "Pending" forever. Perhaps with a logged warning.

[Withsan]

are you solve your problem？same issue on android，but in debian its works fine； @emilk