From 05af4213b593de5e6b73d8dda0eedf54b4568266 Mon Sep 17 00:00:00 2001
From: Yaulendil <davarice@protonmail.com>
Date: Mon, 21 Dec 2020 18:42:29 -0500
Subject: [PATCH 1/2] Implement `AsMut<str>` for `str`

---
 library/core/src/convert/mod.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/library/core/src/convert/mod.rs b/library/core/src/convert/mod.rs
index 3f7110b34cc..d8c2e0b2a3b 100644
--- a/library/core/src/convert/mod.rs
+++ b/library/core/src/convert/mod.rs
@@ -623,6 +623,14 @@ impl AsRef<str> for str {
     }
 }
 
+#[stable(feature = "as_mut_str_for_str", since = "1.50.0")]
+impl AsMut<str> for str {
+    #[inline]
+    fn as_mut(&mut self) -> &mut str {
+        self
+    }
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // THE NO-ERROR ERROR TYPE
 ////////////////////////////////////////////////////////////////////////////////

From bef4ec2fc51aa020fe6bf81257459f096763f3b7 Mon Sep 17 00:00:00 2001
From: Mara Bos <m-ou.se@m-ou.se>
Date: Sat, 30 Jan 2021 22:10:25 +0100
Subject: [PATCH 2/2] Bump as_mut_str_for_str stable version.

---
 library/core/src/convert/mod.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/core/src/convert/mod.rs b/library/core/src/convert/mod.rs
index d8c2e0b2a3b..ea8070534eb 100644
--- a/library/core/src/convert/mod.rs
+++ b/library/core/src/convert/mod.rs
@@ -623,7 +623,7 @@ impl AsRef<str> for str {
     }
 }
 
-#[stable(feature = "as_mut_str_for_str", since = "1.50.0")]
+#[stable(feature = "as_mut_str_for_str", since = "1.51.0")]
 impl AsMut<str> for str {
     #[inline]
     fn as_mut(&mut self) -> &mut str {