From 69e5729c58481e1a2ce4e4a5982d38deab1fc6b2 Mon Sep 17 00:00:00 2001
From: Daniel Henry-Mantilla <daniel.henry.mantilla@gmail.com>
Date: Wed, 4 Nov 2020 14:54:22 +0100
Subject: [PATCH] Simplify the implementation of `get_mut` (no unsafe)

---
 library/core/src/cell.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/library/core/src/cell.rs b/library/core/src/cell.rs
index 7140218fa91..ef2a5dd570f 100644
--- a/library/core/src/cell.rs
+++ b/library/core/src/cell.rs
@@ -1733,8 +1733,7 @@ impl<T: ?Sized> UnsafeCell<T> {
     #[inline]
     #[unstable(feature = "unsafe_cell_get_mut", issue = "76943")]
     pub fn get_mut(&mut self) -> &mut T {
-        // SAFETY: (outer) `&mut` guarantees unique access.
-        unsafe { &mut *self.get() }
+        &mut self.value
     }
 
     /// Gets a mutable pointer to the wrapped value.