From fcc7671ef2cfef0d387e45bc5235a61cef19a4ea Mon Sep 17 00:00:00 2001
From: Amanieu d'Antras <amanieu@gmail.com>
Date: Sat, 29 Sep 2018 00:52:36 +0100
Subject: [PATCH] Make NonNull::dangling a const fn

---
 src/libcore/ptr.rs | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/libcore/ptr.rs b/src/libcore/ptr.rs
index b23b72c372010..947b551399433 100644
--- a/src/libcore/ptr.rs
+++ b/src/libcore/ptr.rs
@@ -2874,10 +2874,9 @@ impl<T: Sized> NonNull<T> {
     /// sentinel value. Types that lazily allocate must track initialization by
     /// some other means.
     #[stable(feature = "nonnull", since = "1.25.0")]
-    pub fn dangling() -> Self {
+    pub const fn dangling() -> Self {
         unsafe {
-            let ptr = mem::align_of::<T>() as *mut T;
-            NonNull::new_unchecked(ptr)
+            NonNull::new_unchecked(mem::align_of::<T>() as *mut T)
         }
     }
 }