Panic on a simple type error

[ghost]

Rust 1.9.0 panics on the following (wrong) code:

use std::io::BufRead;
fn main() {
    let x = b"blabla blibli";
    let s = &x[..];
    let mut v = Vec::new();
    s.read_line(&mut v)
}

(but works fine with String::new() instead of Vec::new()).

[TimNN]

I'm pretty sure that this was fixed by #33852 and should work fine in nightly.

[ghost]

I have no way to run nightly on my machine, feel free to close if fixed.

[oli-obk]

jup, works fine on nightly: https://is.gd/UeG59L

[ghost]

Ok, sorry for the noise.