Error code E0634

A type has conflicting packed representation hints.

Erroneous code examples:

#![allow(unused)]
fn main() {
#[repr(packed, packed(2))] // error!
struct Company(i32);

#[repr(packed(2))] // error!
#[repr(packed)]
struct Company(i32);
}
ⓘ

You cannot use conflicting packed hints on a same type. If you want to pack a type to a given size, you should provide a size to packed:

#![allow(unused)]
fn main() {
#[repr(packed)] // ok!
struct Company(i32);
}