From fe31ad38cb5c6fba5be871ab63082d7cdf430374 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Mon, 27 May 2019 22:42:50 +0300
Subject: [PATCH] Update src/liballoc/boxed.rs

Co-Authored-By: Ralf Jung <post@ralfj.de>
---
 src/liballoc/boxed.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/liballoc/boxed.rs b/src/liballoc/boxed.rs
index 2f45ec7d643f8..76b660fba685c 100644
--- a/src/liballoc/boxed.rs
+++ b/src/liballoc/boxed.rs
@@ -395,6 +395,7 @@ impl<T: Clone> Clone for Box<T> {
 #[stable(feature = "box_slice_clone", since = "1.3.0")]
 impl Clone for Box<str> {
     fn clone(&self) -> Self {
+        // this makes a copy of the data
         let buf: Box<[u8]> = self.as_bytes().into();
         unsafe {
             from_boxed_utf8_unchecked(buf)