#![feature(alloc_layout_extra)]
#![feature(array_chunks)]
+#![feature(array_map)]
#![feature(bool_to_option)]
#![feature(bound_cloned)]
#![feature(box_syntax)]
#![feature(test)]
#![feature(trusted_len)]
#![feature(try_trait)]
-#![feature(inner_deref)]
#![feature(slice_internals)]
#![feature(slice_partition_dedup)]
#![feature(int_error_matching)]