#![feature(const_fn)]
#![feature(core_float)]
#![feature(core_intrinsics)]
-#![cfg_attr(stage0, feature(dotdot_in_tuple_patterns))]
#![feature(dropck_parametricity)]
+#![feature(exact_size_is_empty)]
#![feature(float_extras)]
#![feature(float_from_str_radix)]
#![feature(fn_traits)]
#![feature(panic_unwind)]
#![feature(placement_in_syntax)]
#![feature(prelude_import)]
-#![cfg_attr(stage0, feature(question_mark))]
#![feature(rand)]
#![feature(raw)]
#![feature(repr_simd)]