1 //@compile-flags: -Zmiri-permissive-provenance
2 #![feature(strict_provenance)]
4 // If we have only exposed read-only pointers, doing a write through a wildcard ptr should fail.
8 let _fool = &mut x as *mut i32; // this would have fooled the old untagged pointer logic
9 let addr = (&x as *const i32).expose_addr();
10 let ptr = std::ptr::from_exposed_addr_mut::<i32>(addr);
11 unsafe { *ptr = 0 }; //~ ERROR: /write access using <wildcard> .* no exposed tags have suitable permission in the borrow stack/