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-rw-r--r--src/libcore/hint.rs3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/libcore/hint.rs b/src/libcore/hint.rs
index 9ebcde79b63..3116815f5d6 100644
--- a/src/libcore/hint.rs
+++ b/src/libcore/hint.rs
@@ -45,7 +45,8 @@ use crate::intrinsics;
 /// ```
 #[inline]
 #[stable(feature = "unreachable", since = "1.27.0")]
-pub unsafe fn unreachable_unchecked() -> ! {
+#[rustc_const_unstable(feature = "const_unreachable_unchecked", issue = "53188")]
+pub const unsafe fn unreachable_unchecked() -> ! {
     // SAFETY: the safety contract for `intrinsics::unreachable` must
     // be upheld by the caller.
     unsafe { intrinsics::unreachable() }