rust/tests/ui/nll/issue-55651.rs
2024-02-16 20:02:50 +00:00

29 lines
502 B
Rust

//@ check-pass
use std::mem::ManuallyDrop;
struct A;
struct B;
union U {
a: ManuallyDrop<A>,
b: ManuallyDrop<B>,
}
fn main() {
unsafe {
{
let mut u = U { a: ManuallyDrop::new(A) };
let a = u.a;
u.a = ManuallyDrop::new(A);
let a = u.a; // OK
}
{
let mut u = U { a: ManuallyDrop::new(A) };
let a = u.a;
u.b = ManuallyDrop::new(B);
let a = u.a; // OK
}
}
}