--- /dev/null	2020-03-31 19:14:20.000000000 -0700
+++ new/test/hotspot/jtreg/runtime/Nestmates/membership/Helper.java	2020-03-31 19:14:20.000000000 -0700
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2020, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// Helper for TestNestHostErrorWithClassUnload.
+// This class is loaded into the new classloader to do the test and we invoke
+// its test() method reflectively. It has to be public to be accessible from
+// the un-named package of another loader.
+public class Helper {
+    public static void test() {
+        try {
+            P2.PackagedNestHost2.Member.m();
+            throw new RuntimeException("Call to P2.PackagedNestHost2.Member.m() succeeded unexpectedly!");
+        }
+        catch (IllegalAccessError iae) {
+            System.out.println("Got expected exception:" + iae);
+        }
+    }
+}