#![feature(coerce_unsized)]
#![feature(dispatch_from_dyn)]
#![feature(core_intrinsics)]
-#![feature(custom_attribute)]
+#![cfg_attr(bootstrap, feature(custom_attribute))]
#![feature(dropck_eyepatch)]
#![feature(exact_size_is_empty)]
#![feature(fmt_internals)]
#![feature(maybe_uninit_extra, maybe_uninit_slice, maybe_uninit_array)]
#![feature(alloc_layout_extra)]
#![feature(try_trait)]
-#![feature(iter_nth_back)]
// Allow testing this library