rust/tests/ui/iterators/iter-position-overflow-debug.rs
2024-02-16 20:02:50 +00:00

22 lines
503 B
Rust

//@ run-pass
//@ only-32bit too impatient for 2⁶⁴ items
//@ needs-unwind
//@ compile-flags: -C debug_assertions=yes -C opt-level=3
use std::panic;
fn main() {
let n = usize::MAX as u64;
assert_eq!((0..).by_ref().position(|i| i >= n), Some(usize::MAX));
let r = panic::catch_unwind(|| {
(0..).by_ref().position(|i| i > n)
});
assert!(r.is_err());
let r = panic::catch_unwind(|| {
(0..=n + 1).by_ref().position(|_| false)
});
assert!(r.is_err());
}