rust/tests/fail/stacked_borrows/exposed_only_ro.rs
2022-07-08 16:08:32 +00:00

13 lines
461 B
Rust

//@compile-flags: -Zmiri-permissive-provenance
#![feature(strict_provenance)]
// If we have only exposed read-only pointers, doing a write through a wildcard ptr should fail.
fn main() {
let mut x = 0;
let _fool = &mut x as *mut i32; // this would have fooled the old untagged pointer logic
let addr = (&x as *const i32).expose_addr();
let ptr = std::ptr::from_exposed_addr_mut::<i32>(addr);
unsafe { *ptr = 0 }; //~ ERROR: borrow stack
}