rust/tests/ui/unsafe/access_union_field.rs

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// revisions: mir thir
// [thir]compile-flags: -Z thir-unsafeck
#![allow(unused_variables)]
union Foo {
bar: i8,
baz: u8,
}
fn main() {
let foo = Foo { bar: 5 };
let a = foo.bar; //~ ERROR access to union field is unsafe and requires unsafe function or block
let b = foo.baz; //~ ERROR access to union field is unsafe and requires unsafe function or block
}