#![feature(lang_items)]
#![feature(libc)]
#![feature(linkage, thread_local, asm)]
-#![feature(old_impl_check)]
#![feature(optin_builtin_traits)]
#![feature(rand)]
#![feature(staged_api)]
#![feature(unsafe_no_drop_flag, filling_drop)]
#![feature(macro_reexport)]
#![feature(unique)]
-#![feature(convert)]
#![feature(allow_internal_unstable)]
#![feature(str_char)]
#![feature(into_cow)]
+#![feature(std_misc)]
+#![feature(slice_patterns)]
+#![feature(debug_builders)]
#![cfg_attr(test, feature(test, rustc_private, std_misc))]
// Don't link to std. We are std.