--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/nashorn/script/basic/NASHORN-256.js	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,74 @@
+/*
+ * 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-256 : should be able to delete global builtin objects like JSON, Math etc.
+ *
+ * @test
+ * @run
+ */
+
+function deleteAndCheck(name) {
+    if (! (delete this[name])) {
+        fail("cannot delete " + name);
+    } else {
+        if (typeof this[name] !== 'undefined') {
+            fail(name + " is not undefined after delete!");
+        }
+    }
+}
+
+deleteAndCheck("Object");
+deleteAndCheck("Function");
+deleteAndCheck("Array");
+deleteAndCheck("Boolean");
+deleteAndCheck("Date");
+deleteAndCheck("JSON");
+deleteAndCheck("JSAdapter");
+deleteAndCheck("Math");
+deleteAndCheck("Number");
+deleteAndCheck("RegExp");
+deleteAndCheck("String");
+deleteAndCheck("Error");
+deleteAndCheck("Error");
+deleteAndCheck("RangeError");
+deleteAndCheck("ReferenceError");
+deleteAndCheck("SyntaxError");
+deleteAndCheck("TypeError");
+deleteAndCheck("URIError");
+
+function deleteFailCheck(name) {
+    if (delete this[name]) {
+        fail("can delete " + name);
+    } else {
+        if (typeof this[name] === 'undefined') {
+            fail(name + " was deleted!");
+        }
+    }
+}
+
+deleteFailCheck("NaN");
+deleteFailCheck("Infinity");
+if (delete undefined) {
+    fail("can delete 'undefined'");
+}