From d47964268d37410fe2e742713b6f49a1c9379f41 Mon Sep 17 00:00:00 2001
From: "Shane F. Carr" <shane@unicode.org>
Date: Sat, 23 Dec 2023 14:10:50 -0800
Subject: [PATCH] Update mod.rs

---
 utils/zerovec/src/zerovec/mod.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/utils/zerovec/src/zerovec/mod.rs b/utils/zerovec/src/zerovec/mod.rs
index 771615c55f2..5f5667ceada 100644
--- a/utils/zerovec/src/zerovec/mod.rs
+++ b/utils/zerovec/src/zerovec/mod.rs
@@ -331,8 +331,9 @@ where
     /// backing buffer
     #[inline]
     pub const fn new_borrowed(slice: &'a [T::ULE]) -> Self {
-        // Note: there is an impl From<&T> for NonNull<T> but it is not const
-        let slice = unsafe { NonNull::new_unchecked(slice as *const [T::ULE] as *mut [T::ULE]) };
+        // Safety: references in Rust cannot be null.
+        // The safe function `impl From<&T> for NonNull<T>` is not const.
+        let slice = unsafe { NonNull::new_unchecked(slice as *const [_] as *mut [_]) };
         Self {
             vector: EyepatchHackVector {
                 buf: slice,