task 'rustc' failed at 'called `Option::unwrap()` on a `None` value

[oolon9]

When compiling this file:

//#![feature(phase)]
#[phase(syntax)]
use regex::Regex;

I get the following message:

error: internal compiler error: unexpected failure
This message reflects a bug in the Rust compiler.
We would appreciate a bug report: http://static.rust-lang.org/doc/master/complement-bugreport.html
note: the compiler hit an unexpected failure path. this is a bug
task 'rustc' failed at 'called Option::unwrap() on a None value', /build/build
d/rust-nightly-2014012804058c6c229raring/src/libstd/option.rs:152

I am running rust-nightly 201401280405 amd64 on "Ubuntu 13.04"

[oolon9]

Sorry. Just realised that the 'rust-nightly' for raring is really old. This bug doesn't happen in 'rust-nightly' for Ubuntu 14.04