Lousy Rust Code

Hm.rs

use std::io::stdin;

fn fizzbuzz (n : int) -> String {
    match (n % 3 == 0, n % 5 == 0) {
        (true, true) => "FizzBuzz".to_string(),
        (false, true) => "Fizz".to_string(),
        (true, false) => "Buzz".to_string(),
        (false, false) => n.to_string()
    }
}

fn main () {
    print!("Enter a number: ");
    let input_line =
        stdin()
          .read_line()
          .ok()
          .expect("Failed to read line");
    let trimmed_slice = input_line.as_slice().trim_right_chars('\n');

    let bound = from_str(trimmed_slice).expect("Not an int!");
    for i in range(1, 1 + bound) { // bound + 1 fails with "type must of bound must be known"
        println!("{}", fizzbuzz(i));
    }
}