Update changelog.

133a957e · Stefan Behnel · a68e145e · 133a957e
Commit 133a957e authored May 18, 2020 by Stefan Behnel
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@@ -21,6 +21,10 @@ Features added
 Bugs fixed
 ----------

+* Several issues with arithmetic overflow handling were resolved, including
+  undefined behaviour in C.
+  Patch by Sam Sneddon.  (Github issue #3588)
+
 * The improved GIL handling in ``nogil`` functions introduced in 3.0a3
  could fail to acquire the GIL in some cases on function exit.
  (Github issue #3590 etc.)