mirror of https://github.com/rust-lang/rust
34 lines
595 B
Rust
34 lines
595 B
Rust
//@ 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() {}
|