Enum layout should allow multiple untagged variants if they have nonoverlapping values

[lolbinarycat]

I tried this code:

enum En1 {
    Bool(bool),    
    Other(En2),
}

#[repr(u8)]
enum En2 {
    Six = 6,
    Seven = 7,
}

fn main() {
    dbg!(size_of::<En1>());
}

I expected to see this happen: En1 has size 1

Instead, this happened: En1 has size 2

This will become more of an issue with range types on the horizon

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rustc --version --verbose:

1.85.1