From d14155b1bdccfe0acc0efab4c7986db332e6e191 Mon Sep 17 00:00:00 2001
From: Erik Schnetter <schnetter@gmail.com>
Date: Tue, 23 Aug 2016 08:00:14 -0400
Subject: [PATCH] Describe negative bit shift counts in NEWS.md (#18188)

---
 NEWS.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/NEWS.md b/NEWS.md
index 773f693c1d33d..530777425f5b8 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -195,6 +195,12 @@ This section lists changes that do not have deprecation warnings.
   * `map` on a dictionary now expects a function that expects and returns a `Pair`.
     The result is now another dictionary instead of an array ([#16622]).
 
+  * Bit shift operations (i.e. `<<`, `>>`, and `>>>`) now handle
+    negative shift counts differently: Negative counts are interpreted
+    as shifts in the opposite direction. For example, `4 >> -1 == 4 <<
+    +1 == 8`. Previously, negative counts would implicitly overflow to
+    large positive counts, always yielding either `0` or `-1`.
+
 Library improvements
 --------------------