Initializing an array with `[0, ..-1]` compiles, but causes a segfault at runtime

[bstrie]

fn main() {
    let _x = [0, ..-1];
}

[Aatch]

Seems like a simple oversight, we should make sure that the length is >= 0. I am surprised it doesn't fail trying to emit a -1 alloca though.

[luqmana]

Hmm yea, the count part is just casted to a uint so this is doing the equivalent of [0, ..(MAX_UINT)]

[thestinger]

Ah, so this is really just crashing because it hits the bug we have on very large arrays. Perhaps this isn't really a separate issue than the integer literal overflow and large stack array ones?

[Aatch]

@thestinger either way, negative-length arrays aren't a sane thing to write and should still fail as it's own thing.