#![feature(bool_to_option)]
#![feature(box_syntax)]
#![feature(cell_update)]
-#![feature(cfg_panic)]
-#![cfg_attr(bootstrap, feature(cfg_target_has_atomic))]
#![feature(const_assume)]
#![feature(const_black_box)]
#![feature(const_bool_to_option)]
#![feature(iter_intersperse)]
#![feature(iter_is_partitioned)]
#![feature(iter_order_by)]
+#![feature(iterator_try_collect)]
#![feature(iterator_try_reduce)]
#![feature(const_mut_refs)]
#![feature(const_pin)]