///
/// [`std::convert::identity`]: crate::convert::identity
#[inline]
-#[stable(feature = "bench_black_box", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "bench_black_box", since = "1.66.0")]
#[rustc_const_unstable(feature = "const_black_box", issue = "none")]
pub const fn black_box<T>(dummy: T) -> T {
crate::intrinsics::black_box(dummy)