Issue #4838: When a module is deallocated, free the memory backing the optional module state data.
diff --git a/Misc/NEWS b/Misc/NEWS
index 69c42d2..fee788f 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,9 @@
 Core and Builtins
 -----------------
 
+- Issue #4838: When a module is deallocated, free the memory backing the
+  optional module state data.
+
 - Issue #4910: Rename nb_long slot to nb_reserved, and change its
   type to (void *).