diff options
Diffstat (limited to 'library/core/src/hint.rs')
| -rw-r--r-- | library/core/src/hint.rs | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/library/core/src/hint.rs b/library/core/src/hint.rs index 764e27962..c53175ba4 100644 --- a/library/core/src/hint.rs +++ b/library/core/src/hint.rs @@ -100,7 +100,10 @@ use crate::intrinsics; pub const unsafe fn unreachable_unchecked() -> ! { // SAFETY: the safety contract for `intrinsics::unreachable` must // be upheld by the caller. - unsafe { intrinsics::unreachable() } + unsafe { + intrinsics::assert_unsafe_precondition!("hint::unreachable_unchecked must never be reached", () => false); + intrinsics::unreachable() + } } /// Emits a machine instruction to signal the processor that it is running in @@ -217,7 +220,7 @@ pub fn spin_loop() { /// /// [`std::convert::identity`]: crate::convert::identity #[inline] -#[unstable(feature = "bench_black_box", issue = "64102")] +#[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) |