#![feature(intra_doc_pointers)]
#![feature(lang_items)]
#![feature(let_chains)]
+#![feature(let_else)]
#![feature(linkage)]
#![feature(min_specialization)]
#![feature(must_not_suspend)]
#![feature(map_try_insert)]
#![feature(new_uninit)]
#![feature(thin_box)]
-#![feature(toowned_clone_into)]
#![feature(try_reserve_kind)]
#![feature(vec_into_raw_parts)]
+#![feature(slice_concat_trait)]
//
// Library features (unwind):
#![feature(panic_unwind)]