rust/tests/ui/iterators/iter-count-overflow-debug.rs

16 lines
342 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() {
assert_eq!((0..usize::MAX).by_ref().count(), usize::MAX);
let r = panic::catch_unwind(|| {
(0..=usize::MAX).by_ref().count()
});
assert!(r.is_err());
}