gistfile1.txt

// ------- code ----------
use std::io;

fn main() {
	println!("Type someting!");

	let mut input = String::new();
	match io::stdin().read_line(&mut input) {
	    Ok(n) => println!("You input {}({} bytes)", input, n),
	    Err(error) => println!("error: {}", error)
	}
}
// ------- code ----------


This is the output of terminal when I typed abc, up arrow key once and up arrow key twice

TempMac:Rust lazhcm10381$ ./test
Type someting!
abc
You input abc
(4 bytes)
TempMac:Rust lazhcm10381$ ./test
Type someting!
^[[A
(4 bytes)
TempMac:Rust lazhcm10381$ ./test
Type someting!
(7 bytes)