{"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"MirEvalError::UndefinedBehavior(\"unchecked_rem"}]}
                    MirEvalError::UndefinedBehavior("unchecked_rem with bad inputs".to_owned())
                let ans = lhs.checked_div(rhs).ok_or_else(|| {
                })?;