+#![cfg_attr(not(stage0), feature(const_min_value))]
+#![cfg_attr(not(stage0), feature(const_max_value))]
+#![cfg_attr(not(stage0), feature(const_atomic_bool_new))]
+#![cfg_attr(not(stage0), feature(const_atomic_isize_new))]
+#![cfg_attr(not(stage0), feature(const_atomic_usize_new))]
+#![cfg_attr(not(stage0), feature(const_atomic_i8_new))]
+#![cfg_attr(not(stage0), feature(const_atomic_u8_new))]
+#![cfg_attr(not(stage0), feature(const_atomic_i16_new))]
+#![cfg_attr(not(stage0), feature(const_atomic_u16_new))]
+#![cfg_attr(not(stage0), feature(const_atomic_i32_new))]
+#![cfg_attr(not(stage0), feature(const_atomic_u32_new))]
+#![cfg_attr(not(stage0), feature(const_atomic_i64_new))]
+#![cfg_attr(not(stage0), feature(const_atomic_u64_new))]
+#![cfg_attr(not(stage0), feature(const_unsafe_cell_new))]
+#![cfg_attr(not(stage0), feature(const_cell_new))]
+#![cfg_attr(not(stage0), feature(const_nonzero_new))]
+