From 91c2f78b504e60e5c82ff3944d6663785bf47eee Mon Sep 17 00:00:00 2001
From: jumbatm <jumbatm@gmail.com>
Date: Fri, 27 Dec 2019 20:29:39 +1000
Subject: [PATCH] Clean up const-hack from #58044

---
 src/libcore/num/mod.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/libcore/num/mod.rs b/src/libcore/num/mod.rs
index 2148b6c2b415b..14540394caba1 100644
--- a/src/libcore/num/mod.rs
+++ b/src/libcore/num/mod.rs
@@ -1709,8 +1709,13 @@ assert_eq!(", stringify!($SelfT), "::MIN.overflowing_neg(), (", stringify!($Self
             #[inline]
             #[stable(feature = "wrapping", since = "1.7.0")]
             #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
+            #[allow_internal_unstable(const_if_match)]
             pub const fn overflowing_neg(self) -> (Self, bool) {
-                ((!self).wrapping_add(1), self == Self::min_value())
+                if self == Self::min_value() {
+                    (Self::min_value(), true)
+                } else {
+                    (-self, false)
+                }
             }
         }