From 91cead3cb081f34661ef940b5a911a6e3ba7bbcf Mon Sep 17 00:00:00 2001
From: Peter Szilvasi <peti.szilvasi95@gmail.com>
Date: Fri, 24 Jul 2026 08:29:56 +0000
Subject: [PATCH 1/2] Update expect message using the recommended style in
 binary_heap module

---
 library/alloc/src/collections/binary_heap/mod.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/library/alloc/src/collections/binary_heap/mod.rs b/library/alloc/src/collections/binary_heap/mod.rs
index 34de563fe4f33..98192e1fb5b01 100644
--- a/library/alloc/src/collections/binary_heap/mod.rs
+++ b/library/alloc/src/collections/binary_heap/mod.rs
@@ -1258,7 +1258,7 @@ impl<T, A: Allocator> BinaryHeap<T, A> {
     ///
     ///     Ok(heap.pop())
     /// }
-    /// # find_max_slow(&[1, 2, 3]).expect("why is the test harness OOMing on 12 bytes?");
+    /// # find_max_slow(&[1, 2, 3]).expect("reserving capacity for 12 bytes should never fail");
     /// ```
     #[stable(feature = "try_reserve_2", since = "1.63.0")]
     pub fn try_reserve_exact(&mut self, additional: usize) -> Result<(), TryReserveError> {
@@ -1294,7 +1294,7 @@ impl<T, A: Allocator> BinaryHeap<T, A> {
     ///
     ///     Ok(heap.pop())
     /// }
-    /// # find_max_slow(&[1, 2, 3]).expect("why is the test harness OOMing on 12 bytes?");
+    /// # find_max_slow(&[1, 2, 3]).expect("reserving capacity for 12 bytes should never fail");
     /// ```
     #[stable(feature = "try_reserve_2", since = "1.63.0")]
     pub fn try_reserve(&mut self, additional: usize) -> Result<(), TryReserveError> {

From c46ab28fc3d4876b7be58c2bab8efff05412c07d Mon Sep 17 00:00:00 2001
From: Peter Szilvasi <peti.szilvasi95@gmail.com>
Date: Sun, 26 Jul 2026 13:35:11 +0000
Subject: [PATCH 2/2] Update expect message in
 library/alloc/src/collections/vec_deque/mod.rs

---
 library/alloc/src/collections/vec_deque/mod.rs | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/library/alloc/src/collections/vec_deque/mod.rs b/library/alloc/src/collections/vec_deque/mod.rs
index 9eac8bcde1d1c..9ec82c383e6c7 100644
--- a/library/alloc/src/collections/vec_deque/mod.rs
+++ b/library/alloc/src/collections/vec_deque/mod.rs
@@ -1105,7 +1105,7 @@ impl<T, A: Allocator> VecDeque<T, A> {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[cfg_attr(not(test), rustc_diagnostic_item = "vecdeque_reserve")]
     pub fn reserve(&mut self, additional: usize) {
-        let new_cap = self.len.checked_add(additional).expect("capacity overflow");
+        let new_cap = self.len.checked_add(additional).expect("length should not overflow usize");
         let old_cap = self.capacity();
 
         if new_cap > old_cap {
@@ -1153,7 +1153,7 @@ impl<T, A: Allocator> VecDeque<T, A> {
     ///
     ///     Ok(output)
     /// }
-    /// # process_data(&[1, 2, 3]).expect("why is the test harness OOMing on 12 bytes?");
+    /// # process_data(&[1, 2, 3]).expect("reserving capacity for 12 bytes should never fail");
     /// ```
     #[stable(feature = "try_reserve", since = "1.57.0")]
     pub fn try_reserve_exact(&mut self, additional: usize) -> Result<(), TryReserveError> {
@@ -1201,7 +1201,7 @@ impl<T, A: Allocator> VecDeque<T, A> {
     ///
     ///     Ok(output)
     /// }
-    /// # process_data(&[1, 2, 3]).expect("why is the test harness OOMing on 12 bytes?");
+    /// # process_data(&[1, 2, 3]).expect("reserving capacity for 12 bytes should never fail");
     /// ```
     #[stable(feature = "try_reserve", since = "1.57.0")]
     pub fn try_reserve(&mut self, additional: usize) -> Result<(), TryReserveError> {
@@ -2732,7 +2732,7 @@ impl<T, A: Allocator> VecDeque<T, A> {
     #[stable(feature = "append", since = "1.4.0")]
     pub fn append(&mut self, other: &mut Self) {
         if T::IS_ZST {
-            self.len = self.len.checked_add(other.len).expect("capacity overflow");
+            self.len = self.len.checked_add(other.len).expect("length should not overflow usize");
             other.len = 0;
             other.head = WrappedIndex::zero();
             return;
@@ -3871,7 +3871,7 @@ impl<T, A: Allocator> Index<usize> for VecDeque<T, A> {
 
     #[inline]
     fn index(&self, index: usize) -> &T {
-        self.get(index).expect("Out of bounds access")
+        self.get(index).expect("index should be within bounds")
     }
 }
 
@@ -3879,7 +3879,7 @@ impl<T, A: Allocator> Index<usize> for VecDeque<T, A> {
 impl<T, A: Allocator> IndexMut<usize> for VecDeque<T, A> {
     #[inline]
     fn index_mut(&mut self, index: usize) -> &mut T {
-        self.get_mut(index).expect("Out of bounds access")
+        self.get_mut(index).expect("index should be within bounds")
     }
 }