| //@ run-pass | |
| #![allow(dead_code)] | |
| //@ compile-flags: -Zmir-opt-level=1 | |
| use std::mem; | |
| #[derive(Copy, Clone)] | |
| enum Never {} | |
| union Foo { | |
| a: u64, | |
| b: Never | |
| } | |
| fn foo(xs: [(Never, u32); 1]) -> u32 { xs[0].1 } | |
| fn bar([(_, x)]: [(Never, u32); 1]) -> u32 { x } | |
| fn main() { | |
| println!("{}", mem::size_of::<Foo>()); | |
| let f = [Foo { a: 42 }, Foo { a: 10 }]; | |
| println!("{:?}", unsafe { f[0].a }); | |
| } |