From 14769ce96f53553c9f61b9d5ef950cfbe85d7e51 Mon Sep 17 00:00:00 2001
From: ibraheemdev <ibrah1440@gmail.com>
Date: Tue, 31 Aug 2021 13:25:09 -0400
Subject: [PATCH] enable `slice_swap_unchecked` feature in doc test

---
 library/core/src/slice/mod.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/library/core/src/slice/mod.rs b/library/core/src/slice/mod.rs
index 2624df78a761..16e3c9e52fa9 100644
--- a/library/core/src/slice/mod.rs
+++ b/library/core/src/slice/mod.rs
@@ -583,6 +583,8 @@ impl<T> [T] {
     /// # Examples
     ///
     /// ```
+    /// #![feature(slice_swap_unchecked)]
+    ///
     /// let mut v = ["a", "b", "c", "d"];
     /// // SAFETY: we know that 1 and 3 are both indices of the slice
     /// unsafe { v.swap_unchecked(1, 3) };