From a5734ca41748dfd62904c1b5a1ade7ecd0f9c11e Mon Sep 17 00:00:00 2001
From: mendess <pedro.mendes.26@gmail.com>
Date: Sat, 23 May 2020 14:08:53 +0100
Subject: [PATCH] Override Box::<[T]>::clone_from

---
 src/liballoc/boxed.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/liballoc/boxed.rs b/src/liballoc/boxed.rs
index 8ef6090c743..bbe68e4222a 100644
--- a/src/liballoc/boxed.rs
+++ b/src/liballoc/boxed.rs
@@ -1090,6 +1090,14 @@ impl<T: Clone> Clone for Box<[T]> {
     fn clone(&self) -> Self {
         self.to_vec().into_boxed_slice()
     }
+
+    fn clone_from(&mut self, other: &Self) {
+        if self.len() == other.len() {
+            self.clone_from_slice(&other);
+        } else {
+            *self = other.clone();
+        }
+    }
 }
 
 #[stable(feature = "box_borrow", since = "1.1.0")]