Issue #15781: Fix two small race conditions in import's module locking.
diff --git a/Misc/NEWS b/Misc/NEWS
index 50baf86..04a98ab 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -13,6 +13,8 @@
 - Issue #15784: Modify OSError.__str__() to better distinguish between
   errno error numbers and Windows error numbers.
 
+- Issue #15781: Fix two small race conditions in import's module locking.
+
 Library
 -------