8030781: System.setProperties(null) drops all system properties (RELEASE not set)

Reviewed-by: alanb

jdk/test/java/lang/System/SetPropertiesNull.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2014, 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.
+ */
+
+/*
+ * This class tests to see if the system property java.version is properly
+ * reinitialized after setting System.setProperties(null).
+ *
+ * @test
+ * @bug 8030781
+ * @summary Test for System.setProperties(null).
+ */
+
+public class SetPropertiesNull {
+
+    public static void main(String args[]) {
+        final String version = System.getProperty("java.version");
+        System.setProperties(null);
+        final String newVersion = System.getProperty("java.version");
+        if (!version.equals(newVersion)) {
+            throw new RuntimeException("java.version differs: '" + version + "'  '"
+                               + newVersion + "'");
+        }
+    }
+}