Bug #1576657: when setting a KeyError for a tuple key, make sure that
the tuple isn't used as the "exception arguments tuple".
diff --git a/Misc/NEWS b/Misc/NEWS
index d754849..4d1396c 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,9 @@
Core and builtins
-----------------
+- Bug #1576657: when setting a KeyError for a tuple key, make sure that
+ the tuple isn't used as the "exception arguments tuple".
+
- Bug #1565514, SystemError not raised on too many nested blocks.
- Bug #1576174: WindowsError now displays the windows error code