#![feature(decode_utf16)]
#![feature(dropck_parametricity)]
#![feature(fmt_internals)]
-#![feature(fmt_radix)]
#![feature(heap_api)]
#![feature(inclusive_range)]
#![feature(iter_arith)]
#![feature(lang_items)]
#![feature(nonzero)]
-#![feature(num_bits_bytes)]
#![feature(pattern)]
#![feature(placement_in)]
#![feature(placement_new_protocol)]
#![feature(shared)]
-#![feature(slice_bytes)]
#![feature(slice_patterns)]
#![feature(staged_api)]
#![feature(step_by)]