Index: generic/nsf.c
===================================================================
diff -u -r67591822465e64d9051583c9aa71f8d3a4ef5c96 -r5dd22868ad67333b73cf381fe3fcb726c5044701
--- generic/nsf.c	(.../nsf.c)	(revision 67591822465e64d9051583c9aa71f8d3a4ef5c96)
+++ generic/nsf.c	(.../nsf.c)	(revision 5dd22868ad67333b73cf381fe3fcb726c5044701)
@@ -20235,6 +20235,9 @@
       if (NsfClassListFind(clPtr->nextPtr, clPtr->cl)) continue;
       AppendMatchingElement(interp, resultObj, clPtr->cl->object.cmdName, patternString);
     }
+
+    NsfClassListFree(checkList);
+    NsfClassListFree(mixinClasses);
     
   } else if (withClosure) {
     Tcl_HashTable objTable, *commandTable = &objTable;