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#![allow(dead_code)]
union U {
a: u8, // OK
}
union W {
a: String, //~ ERROR field must implement `Copy` or be wrapped in `ManuallyDrop<...>` to be used in a union
b: String, // OK, only one field is reported
}
struct S(String);
// `S` doesn't implement `Drop` trait, but still has non-trivial destructor
union Y {
a: S, //~ ERROR field must implement `Copy` or be wrapped in `ManuallyDrop<...>` to be used in a union
}
// We don't know if `T` is trivially-destructable or not until trans
union J<T> {
a: T, //~ ERROR field must implement `Copy` or be wrapped in `ManuallyDrop<...>` to be used in a union
}
union H<T: Copy> {
a: T, // OK, `T` is `Copy`, no destructor
}
fn main() {}
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