rust/tests/ui/consts/const-eval/union_promotion.rs

#[repr(C)]
union Foo {
    a: &'static u32,
    b: usize,
}

fn main() {
    let x: &'static bool = &unsafe { //~ temporary value dropped while borrowed
        Foo { a: &1 }.b == Foo { a: &2 }.b
    };
}
const-eval tests: make all unions repr(C) 2019-08-30 02:35:02 -05:00			`#[repr(C)]`
Do not promote union field accesses 2018-06-03 12:00:22 -05:00			`union Foo {`
			`a: &'static u32,`
			`b: usize,`
			`}`

			`fn main() {`
update tests for migrate mode by default 2019-04-22 02:40:08 -05:00			`let x: &'static bool = &unsafe { //~ temporary value dropped while borrowed`
Do not promote union field accesses 2018-06-03 12:00:22 -05:00			`Foo { a: &1 }.b == Foo { a: &2 }.b`
			`};`
			`}`