--- a/nashorn/src/jdk/nashorn/internal/runtime/linker/NashornStaticClassLinker.java	Thu May 22 14:40:06 2014 -0700
+++ b/nashorn/src/jdk/nashorn/internal/runtime/linker/NashornStaticClassLinker.java	Mon May 26 15:48:25 2014 +0530
@@ -25,6 +25,7 @@
 
 package jdk.nashorn.internal.runtime.linker;
 
+import java.lang.reflect.Modifier;
 import jdk.internal.dynalink.CallSiteDescriptor;
 import jdk.internal.dynalink.beans.BeansLinker;
 import jdk.internal.dynalink.beans.StaticClass;
@@ -65,10 +66,15 @@
             return null;
         }
         final Class<?> receiverClass = ((StaticClass) self).getRepresentedClass();
+
         Bootstrap.checkReflectionAccess(receiverClass, true);
         final CallSiteDescriptor desc = request.getCallSiteDescriptor();
         // We intercept "new" on StaticClass instances to provide additional capabilities
         if ("new".equals(desc.getNameToken(CallSiteDescriptor.OPERATOR))) {
+            if (! Modifier.isPublic(receiverClass.getModifiers())) {
+                throw ECMAErrors.typeError("new.on.nonpublic.javatype", receiverClass.getName());
+            }
+
             // make sure new is on accessible Class
             Context.checkPackageAccess(receiverClass);
 

--- a/nashorn/src/jdk/nashorn/internal/runtime/resources/Messages.properties	Thu May 22 14:40:06 2014 -0700
+++ b/nashorn/src/jdk/nashorn/internal/runtime/resources/Messages.properties	Mon May 26 15:48:25 2014 +0530
@@ -138,6 +138,7 @@
 type.error.method.not.constructor=Java method {0} can't be used as a constructor.
 type.error.env.not.object=$ENV must be an Object.
 type.error.unsupported.java.to.type=Unsupported Java.to target type {0}.
+type.error.new.on.nonpublic.javatype=new cannot be used with non-public java type {0}.
 
 range.error.dataview.constructor.offset=Wrong offset or length in DataView constructor
 range.error.dataview.offset=Offset is outside the bounds of the DataView

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nashorn/test/script/basic/JDK-8043930.js	Mon May 26 15:48:25 2014 +0530
@@ -0,0 +1,37 @@
+/*
+ * 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.
+ */
+
+/**
+ * JDK-8043930: TypeError when attemping to create an instance of non-public class could be better 
+ *
+ * @test
+ * @run
+ */
+
+var NonPublicClass = Java.type("jdk.nashorn.test.models.NonPublicClass");
+try {
+    var obj = new NonPublicClass();
+    fail("Expected TypeError to be thrown!");
+} catch (e) {
+    print(e);
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nashorn/test/script/basic/JDK-8043930.js.EXPECTED	Mon May 26 15:48:25 2014 +0530
@@ -0,0 +1,1 @@
+TypeError: new cannot be used with non-public java type jdk.nashorn.test.models.NonPublicClass.