#![feature(core_intrinsics)]
#![feature(discriminant_kind)]
#![feature(exhaustive_patterns)]
+#![feature(generators)]
#![feature(get_mut_unchecked)]
#![feature(if_let_guard)]
+#![feature(iter_from_generator)]
#![feature(negative_impls)]
#![feature(never_type)]
#![feature(extern_types)]
#![feature(min_specialization)]
#![feature(trusted_len)]
#![feature(type_alias_impl_trait)]
+#![feature(strict_provenance)]
#![feature(associated_type_bounds)]
#![feature(rustc_attrs)]
#![feature(control_flow_enum)]