ICE initializing tuple-struct with field initializers

[brson]

struct NonCopyable(());

fn main() {
    let z = NonCopyable { p: () };
}

/home/brian/dev/rust/src/test/run-pass/test.rs:4:26: 4:31 error: structure has no field named `p`
/home/brian/dev/rust/src/test/run-pass/test.rs:4     let z = NonCopyable { p: () };
                                                                           ^~~~~
/home/brian/dev/rust/src/test/run-pass/test.rs:4:12: 4:23 error: missing fields: `__field__`, `__field__`
/home/brian/dev/rust/src/test/run-pass/test.rs:4     let z = NonCopyable { p: () };
                                                             ^~~~~~~~~~~
error: internal compiler error: no type for node 11: expr () (id=11) in fcx 2b8288481970

[catamorphism]

I'm bumping this sooner because I think ICEs are important to squash and also because I'm working on another tuple-struct bug, so maybe I can grab this easily.

[catamorphism]

I fixed this bug in my branch, but have decided to revamp how typeck handles bot and ty_err types. This may be either a good idea or the best idea.

[catamorphism]

I should actually be able to get this in for 0.6

[catamorphism]

Fixed in 6aa612a , test case added.