ICE: UnsizeLength with bad sty

[dotdash]

This code:

fn main() {
    let x = [1, 2, 3];
    let y = x.as_slice();
}

Fails with:

slicesize.rs:3:13: 3:14 error: internal compiler error: UnsizeLength with bad sty: [type error]
slicesize.rs:3     let y = x.as_slice();
                           ^
note: the compiler hit an unexpected failure path. this is a bug.
note: we would appreciate a bug report: http://doc.rust-lang.org/complement-bugreport.html
note: run with `RUST_BACKTRACE=1` for a backtrace
task 'rustc' failed at 'Box<Any>', /home/bs/src/rust/src/libsyntax/ast_util.rs:776

The ICE does not happen when the integer type is known, e.g. by using 1u8 as the first value.

[nrc]

cc me

[nrc]

I'll look at this tomorrow.

[nodakai]

I hit an ICE with this code

fn main() {
    [0].len();
}

slice_to_vec.rs:2:5: 2:8 error: internal compiler error: borrow-vec associated with bad sty: &ty_err
slice_to_vec.rs:2     [0].len();
                      ^~~

[].len(); gave the same ICE but [0i].len(); was OK.

Will the above commit fix this ICE, too?

rustc 0.12.0-pre-nightly (5fb2dfa 2014-08-25 12:10:56 +0000)