#![feature(in_band_lifetimes)]
#![feature(array_windows)]
#![feature(assert_matches)]
-#![feature(bindings_after_at)]
+#![cfg_attr(bootstrap, feature(bindings_after_at))]
#![feature(bool_to_option)]
#![feature(box_patterns)]
#![feature(box_syntax)]
#![feature(once_cell)]
#![feature(control_flow_enum)]
#![feature(try_reserve)]
+#![feature(try_reserve_kind)]
#![recursion_limit = "256"]
#[macro_use]