Constants and expressions have diverged on enum-to-float casts.

[jld]

This program:

enum E { L0 = -1, H0 = 1 }
enum F { L1 = 1, H1 = 0xFFFFFFFFFFFFFFFF }
static C0: float = L0 as float;
static C1: float = H1 as float;
pub fn main() {
        println(fmt!("%?", L0 as float));
        println(fmt!("%?", C0));
        println(fmt!("%?", H1 as float));
        println(fmt!("%?", C1));
}

prints this (on x86_64):

-1
18446744073709552046
-1
18446744073709552046

This seems wrong. It would've been introduced by #8000, I think. Which of the two behaviors seen here is right?

[sanxiyn]

Nominating.

[pnkfelix]

P-backcompat-lang, 1.0.

[hirschenberger]

Updated example:

enum E { L0 = -1, H0 = 1 }
enum F { L1 = 1, H1 = 0xFFFFFFFFFFFFFFFF }
static C0: f32 = L0 as f32;
static C1: f32 = H1 as f32;
pub fn main() {
        println!("{:?}", L0 as f32);
        println!("{:?}", C0);
        println!("{:?}", H1 as f32);
        println!("{:?}", C1);
}

What's the desired behaviour?