--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/nashorn/script/basic/NASHORN-511.js	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2010, 2013, 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.
+ */
+
+/**
+ * NASHORN-511 : var has no effect on existing globals.
+ *
+ * @test
+ * @run
+ */
+
+var y = 23;
+if (delete y != false) {
+    fail('#1: can delete declared var y');
+}
+if (delete this.y != false) {
+    fail('#2: can delete declared var using this.y');
+}
+
+var parseInt = 23;
+if (delete parseInt !== true) {
+    fail('#3: delete parseInt !== true');
+}
+if (delete this.parseInt !== true) {
+    fail('#4: delete this.parseInt !== true');
+}
+
+z = 24;
+eval("var z = 25;\
+if (delete z !== true) {\
+    fail('#5: delete z !== true');\
+}\
+if (delete this.z !== true) {\
+    fail('#6: delete this.z !== true');\
+}\
+");