Rollup merge of #78735 - danielhenrymantilla:simplify-unsafecell-getm…

…ut, r=RalfJung Simplify the implementation of `get_mut` (no unsafe) Quick PR to reduce one use of `unsafe` pointed out in the previous PR r? ````@RalfJung````
rust-lang · Nov 5, 2020 · 29fad21 · 29fad21
2 parents 8640360 + 69e5729
commit 29fad21
Showing 1 changed file with 1 addition and 2 deletions.
diff --git 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.