#![feature(const_intrinsic_copy)]
#![feature(const_intrinsic_forget)]
#![feature(const_likely)]
+#![feature(const_maybe_uninit_uninit_array)]
#![feature(const_maybe_uninit_as_mut_ptr)]
#![feature(const_maybe_uninit_assume_init)]
+#![feature(const_nonnull_new)]
#![feature(const_num_from_num)]
#![feature(const_ops)]
#![feature(const_option)]
#![feature(const_option_ext)]
#![feature(const_pin)]
#![feature(const_replace)]
+#![feature(const_ptr_as_ref)]
#![feature(const_ptr_is_null)]
#![feature(const_ptr_offset_from)]
#![feature(const_ptr_read)]
#![feature(const_precise_live_drops)]
#![feature(const_refs_to_cell)]
#![feature(decl_macro)]
-#![feature(derive_default_enum)]
+#![cfg_attr(bootstrap, feature(derive_default_enum))]
#![feature(deprecated_suggestion)]
#![feature(doc_cfg)]
#![feature(doc_notable_trait)]