1 files changed, 3 insertions, 0 deletions
diff --git a/Misc/NEWS b/Misc/NEWS
index d0593c2..17e9d1c 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -22,6 +22,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #21173: Fix len() on a WeakKeyDictionary when .clear() was called
+  with an iterator alive.
+
 - Issue #11866: Eliminated race condition in the computation of names
   for new threads.