Why is it no possible to return a reference from a closure?

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    You can probably achieve the results you want by making a function helper with a higher rank lifetime and using it inside of your closure `https://github.com/rust-lang/rust/issues/58052

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    RFCs for changes to Rust

    This looks familiar, I wonder if it would work if a lifetime were able to be declared to constrain the input and output to the same lifetime.

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