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並前往https://stackoverflow.com/questions/68882594/using-the-resultt-boxdyn-error-trick-in-rust-but-across-multiple-threads

Using the `Result>` trick in Rust, but across ...

The implemention in std you are looking for is this: impl<'a, E: Error + Send + Sync + 'a> From<E> for Box<dyn Error + Send + Sync + 'a>.

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