| //@ 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() {} |
