ICE rather than "unresolved import" when use is mixed with [#phase(syntax)]

[rapha]

$ ls
main.rs
$ cat main.rs 
#[feature(phase)];

#[phase(syntax)]
use unresolved;

fn main() { }
$ rustc main.rs 
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
Ok(task 'rustc' failed at 'called `Option::unwrap()` on a `None` value', /Users/foo/code/rust/lang/rust/src/libstd/option.rs:152
)
$ 

[sfackler]

Dup of #11806. I should really fix this....

[sfackler]

The real issue is that #[phase(syntax)] only works with extern mod statements, not use statements.