ICE when transmuting [T,..1] to T

[brendanzab]

fn main() {
    unsafe { std::cast::transmute::<[int,..1],int>([1]) }
}

rust: task failed at 'option::get none', /rust/src/libstd/option.rs:362
error: internal compiler error: unexpected failure
note: the compiler hit an unexpected failure path. this is a bug
note: try running with RUST_LOG=rustc=1,::rt::backtrace to get further details and report the results to github.com/mozilla/rust/issues
rust: task failed at 'explicit failure', /rust/src/librustc/rustc.rs:366
rust: domain main @0x7f822300c610 root task failed

[alexcrichton]

ping @dotdash, this appears to be dying at https://github.com/mozilla/rust/blob/52b7fc14fe4444f0de91a474c70cbf248f96b763/src/librustc/middle/trans/foreign.rs#L812

[dotdash]

Yeah, I forgot to make the immediate/non-immediate distinction for the out-type there. Testing a fix now...