#![feature(extern_types)]
#![feature(fundamental)]
#![feature(intrinsics)]
+#![feature(is_sorted)]
+#![feature(iter_once_with)]
#![feature(lang_items)]
#![feature(link_llvm_intrinsics)]
#![feature(never_type)]
#![feature(const_slice_len)]
#![feature(const_str_as_bytes)]
#![feature(const_str_len)]
+#![cfg_attr(stage0, feature(const_let))]
#![cfg_attr(stage0, feature(const_int_rotate))]
#![feature(const_int_conversion)]
#![feature(const_transmute)]