#4373: Reference leak in the pickle module.

Reviewed by Brett Cannon.
diff --git a/Misc/NEWS b/Misc/NEWS
index bc127e7..50a3331 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -22,6 +22,8 @@
 Library
 -------
 
+- Issue #4373: Corrected a potential reference leak in the pickle module.
+
 - Issue #4382: dbm.dumb did not specify the expected file encoding for opened
   files.