mirror of
https://github.com/rust-lang/rust
synced 2024-11-05 20:45:15 +00:00
21 lines
562 B
Rust
21 lines
562 B
Rust
#[derive(Copy, Clone)]
|
|
enum Void {}
|
|
|
|
// Tests that we detect unsafe places (specifically, union fields and
|
|
// raw pointer dereferences), even when they're matched on while having
|
|
// an uninhabited type (equivalent to `std::intrinsics::unreachable()`).
|
|
|
|
fn union_field() {
|
|
union Union { unit: (), void: Void }
|
|
let u = Union { unit: () };
|
|
match u.void {}
|
|
//~^ ERROR access to union field is unsafe
|
|
}
|
|
|
|
fn raw_ptr_deref() {
|
|
let ptr = std::ptr::null::<Void>();
|
|
match *ptr {}
|
|
//~^ ERROR dereference of raw pointer is unsafe
|
|
}
|
|
|
|
fn main() {}
|