From dc2347cbc498a853fafd6c385ab67c01857f5a27 Mon Sep 17 00:00:00 2001
From: Marijn Schouten <hkBst@users.noreply.github.com>
Date: Tue, 19 Nov 2024 14:40:05 +0100
Subject: [PATCH] Fix unsoundness of peek_ahead in iter.rs

---
 src/iter.rs | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/src/iter.rs b/src/iter.rs
index 4c5fa88..e74c317 100644
--- a/src/iter.rs
+++ b/src/iter.rs
@@ -43,12 +43,9 @@ impl<'a> Bytes<'a> {
 
     #[inline]
     pub fn peek_ahead(&self, n: usize) -> Option<u8> {
-        // SAFETY: obtain a potentially OOB pointer that is later compared against the `self.end`
-        // pointer.
-        let ptr = self.cursor.wrapping_add(n);
-        if ptr < self.end {
+        if n < self.len() {
             // SAFETY: bounds checked pointer dereference is safe
-            Some(unsafe { *ptr })
+            Some(unsafe { *self.cursor.add(n) })
         } else {
             None
         }