rust/src/test/run-fail/str-overrun.rs

// -*- rust -*-

// error-pattern:bounds check
fn main() {
    let s: str = "hello";
    let x: int = 0;
    assert (s[x] == 0x68 as u8);
    // NB: at the moment a string always has a trailing NULL,
    // so the largest index value on the string above is 5, not
    // 4. Possibly change this.

    // Bounds-check failure.

    assert (s[x + 6] == 0x0 as u8);
}