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You could use something like Go's 'defer' statement to ensure 'close' is called before the current function returns.

Which already exists in Rust in the form of... wait for it... the Drop trait. It's the same thing.

The difference is that Go's `defer` is explicitly written out in the relevant scope, while Rust's `Drop` is implicit and defined elsewhere.

There's a "scopeguard" crate that uses Drop to make it explicit.