#![feature(link_args)]
#![feature(linkage)]
#![feature(log_syntax)]
-#![feature(manually_drop_take)]
#![feature(maybe_uninit_ref)]
#![feature(maybe_uninit_slice)]
#![feature(needs_panic_runtime)]
#![feature(shrink_to)]
#![feature(slice_concat_ext)]
#![feature(slice_internals)]
-#![feature(slice_patterns)]
+#![cfg_attr(bootstrap, feature(slice_patterns))]
#![feature(specialization)]
#![feature(staged_api)]
#![feature(std_internals)]