From ecf301d987ed944ef96f627757a0fc58608ff1bb Mon Sep 17 00:00:00 2001
From: Bastian Kauschke <bastian_kauschke@hotmail.de>
Date: Sun, 22 Mar 2020 14:59:38 +0100
Subject: [PATCH] document invariant of `VecDeque::as_(mut)_slice`

---
 src/liballoc/collections/vec_deque.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/liballoc/collections/vec_deque.rs b/src/liballoc/collections/vec_deque.rs
index 0ad59d2a20c..b9d91876db3 100644
--- a/src/liballoc/collections/vec_deque.rs
+++ b/src/liballoc/collections/vec_deque.rs
@@ -959,6 +959,9 @@ impl<T> VecDeque<T> {
     /// Returns a pair of slices which contain, in order, the contents of the
     /// `VecDeque`.
     ///
+    /// In case [`make_contiguous`](#method.make_contiguous) was previously called,
+    /// all elements of the deque are in the first slice and the second slice is empty.
+    ///
     /// # Examples
     ///
     /// ```
@@ -989,6 +992,9 @@ impl<T> VecDeque<T> {
     /// Returns a pair of slices which contain, in order, the contents of the
     /// `VecDeque`.
     ///
+    /// In case [`make_contiguous`](#method.make_contiguous) was previously called,
+    /// all elements of the deque are in the first slice and the second slice is empty.
+    ///
     /// # Examples
     ///
     /// ```