#![cfg_attr(stage0, feature(copy_closures, clone_closures))]
#![feature(crate_visibility_modifier)]
#![feature(from_ref)]
-#![feature(match_default_bindings)]
+#![cfg_attr(stage0, feature(match_default_bindings))]
#![feature(exhaustive_patterns)]
#![feature(option_filter)]
#![feature(quote)]