#![feature(box_syntax)]
#![feature(cell_extras)]
#![feature(const_fn)]
+#![feature(copy_from_slice)]
#![feature(core_float)]
#![feature(core_private_bignum)]
#![feature(core_private_diy_float)]
#![feature(fixed_size_array)]
#![feature(float_extras)]
#![feature(flt2dec)]
-#![feature(fmt_radix)]
-#![feature(iter_arith)]
#![feature(iter_arith)]
#![feature(libc)]
#![feature(nonzero)]