rust/tests/compile-fail/stacked_borrows/buggy_split_at_mut.rs

26 lines
653 B
Rust

#![allow(unused_variables)]
mod safe {
use std::slice::from_raw_parts_mut;
pub fn split_at_mut<T>(self_: &mut [T], mid: usize) -> (&mut [T], &mut [T]) {
let len = self_.len();
let ptr = self_.as_mut_ptr();
unsafe {
assert!(mid <= len);
(from_raw_parts_mut(ptr, len - mid), // BUG: should be "mid" instead of "len - mid"
//~^ ERROR reference with non-reactivatable tag
from_raw_parts_mut(ptr.offset(mid as isize), len - mid))
}
}
}
fn main() {
let mut array = [1,2,3,4];
let (a, b) = safe::split_at_mut(&mut array, 0);
a[1] = 5;
b[1] = 6;
}