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並前往https://stackoverflow.com/questions/61050129/how-can-i-use-rust-try-trait-with-option-noneerror?rq=1

How can I use rust Try trait with Option NoneError? - Stack ...

This is probably what you want use std::io::{Error, ErrorKind}; fn main() { let emptyvec = Vec::new(); match Frame::from_bytes(&emptyvec) ...

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