// In this case, the code should compile but
// the check should fail at runtime
// error-pattern:Predicate same_length
use std;
import uint;
import u8;
import vec::*;

fn enum_chars(start: u8, end: u8) -> [char] {
    assert start < end;
    let mut i = start;
    let mut r = [];
    while i <= end { r += [i as char]; i += 1u as u8; }
    ret r;
}

fn enum_uints(start: uint, end: uint) -> [uint] {
    assert start < end;
    let mut i = start;
    let mut r = [];
    while i <= end { r += [i]; i += 1u; }
    ret r;
}

fn main() {
    let a = 'a' as u8, j = 'j' as u8, k = 1u, l = 9u;
    // Silly, but necessary
    check (u8::le(a, j));
    check (uint::le(k, l));
    let chars = enum_chars(a, j);
    let ints = enum_uints(k, l);

    check (same_length(chars, ints));
    let ps = zip(chars, ints);
    fail "the impossible happened";
}