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use std::{error::Error, fmt}; #[derive(Debug)] pub struct LogicError { message: String } impl LogicError { pub fn new(message: String) -> LogicError { LogicError{ message } } } impl fmt::Display for LogicError { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { write!(f, "{}", self) } } impl Error for LogicError {}