--- old/src/java.base/share/classes/java/io/DeleteOnExitHook.java	2019-07-09 11:05:44.000000000 -0700
+++ new/src/java.base/share/classes/java/io/DeleteOnExitHook.java	2019-07-09 11:05:44.000000000 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -64,6 +64,12 @@
         files.add(file);
     }
 
+    static synchronized void remove(String file) {
+        if(files != null) {
+            files.remove(file);
+        }
+    }
+
     static void runHooks() {
         LinkedHashSet<String> theFiles;