1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
// ignore-32bit
// This test gives a different error on 32-bit architectures.
// stderr-per-bitwidth
union Transmute<T: Copy, U: Copy> {
t: T,
u: U,
}
trait Bar {
fn bar(&self) -> u32;
}
struct Foo {
foo: u32,
bar: bool,
}
impl Bar for Foo {
fn bar(&self) -> u32 {
self.foo
}
}
#[derive(Copy, Clone)]
struct Fat<'a>(&'a Foo, &'static VTable);
struct VTable {
size: Foo,
}
const FOO: &dyn Bar = &Foo {
foo: 128,
bar: false,
};
const G: Fat = unsafe { Transmute { t: FOO }.u };
//~^ ERROR it is undefined behavior to use this value
fn main() {}
|
