#![feature(core_intrinsics)]
#![feature(custom_test_frameworks)]
#![feature(decl_macro)]
-#![feature(doc_alias)]
+#![cfg_attr(bootstrap, feature(doc_alias))]
#![feature(doc_cfg)]
#![feature(doc_keyword)]
#![feature(doc_masked)]
#![feature(external_doc)]
#![feature(fn_traits)]
#![feature(format_args_nl)]
-#![feature(future_readiness_fns)]
#![feature(gen_future)]
#![feature(generator_trait)]
#![feature(global_asm)]
#![feature(integer_atomics)]
#![feature(into_future)]
#![feature(lang_items)]
-#![feature(libc)]
#![feature(link_args)]
#![feature(linkage)]
#![feature(llvm_asm)]