--- a/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/objects/NativeJavaImporter.java	Wed Jul 05 20:04:04 2017 +0200
+++ b/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/objects/NativeJavaImporter.java	Fri Oct 10 17:59:22 2014 +0530
@@ -25,6 +25,7 @@
 
 package jdk.nashorn.internal.objects;
 
+import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
 import static jdk.nashorn.internal.runtime.UnwarrantedOptimismException.isValid;
 
 import jdk.internal.dynalink.CallSiteDescriptor;
@@ -36,9 +37,11 @@
 import jdk.nashorn.internal.objects.annotations.Function;
 import jdk.nashorn.internal.objects.annotations.ScriptClass;
 import jdk.nashorn.internal.runtime.Context;
+import jdk.nashorn.internal.runtime.JSType;
 import jdk.nashorn.internal.runtime.NativeJavaPackage;
 import jdk.nashorn.internal.runtime.PropertyMap;
 import jdk.nashorn.internal.runtime.ScriptObject;
+import jdk.nashorn.internal.runtime.ScriptRuntime;
 import jdk.nashorn.internal.runtime.UnwarrantedOptimismException;
 
 /**
@@ -94,33 +97,30 @@
     }
 
     /**
-     * "No such property" call placeholder.
-     *
-     * This can never be called as we override {@link ScriptObject#noSuchProperty}. We do declare it here as it's a signal
-     * to {@link jdk.nashorn.internal.runtime.WithObject} that it's worth trying doing a {@code noSuchProperty} on this object.
+     * "No such property" handler.
      *
      * @param self self reference
      * @param name property name
-     * @return never returns
+     * @return value of the missing property
      */
     @Function(attributes = Attribute.NOT_ENUMERABLE)
     public static Object __noSuchProperty__(final Object self, final Object name) {
-        throw new AssertionError("__noSuchProperty__ placeholder called");
+        if (! (self instanceof NativeJavaImporter)) {
+            throw typeError("not.a.java.importer", ScriptRuntime.safeToString(self));
+        }
+        return ((NativeJavaImporter)self).createProperty(JSType.toString(name));
     }
 
     /**
-     * "No such method call" placeholder
-     *
-     * This can never be called as we override {@link ScriptObject#noSuchMethod}. We do declare it here as it's a signal
-     * to {@link jdk.nashorn.internal.runtime.WithObject} that it's worth trying doing a noSuchProperty on this object.
+     * "No such method call" handler
      *
      * @param self self reference
      * @param args arguments to method
-     * @return never returns
+     * @return never returns always throw TypeError
      */
     @Function(attributes = Attribute.NOT_ENUMERABLE)
     public static Object __noSuchMethod__(final Object self, final Object... args) {
-        throw new AssertionError("__noSuchMethod__ placeholder called");
+       throw typeError("not.a.function", ScriptRuntime.safeToString(args[0]));
     }
 
     @Override

--- a/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/WithObject.java	Wed Jul 05 20:04:04 2017 +0200
+++ b/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/WithObject.java	Fri Oct 10 17:59:22 2014 +0530
@@ -210,6 +210,19 @@
     }
 
     @Override
+    protected Object invokeNoSuchProperty(final String name, final int programPoint) {
+        FindProperty find = expression.findProperty(NO_SUCH_PROPERTY_NAME, true);
+        if (find != null) {
+            final Object func = find.getObjectValue();
+            if (func instanceof ScriptFunction) {
+                return ScriptRuntime.apply((ScriptFunction)func, expression, name);
+            }
+        }
+
+        return getProto().invokeNoSuchProperty(name, programPoint);
+    }
+
+    @Override
     public void setSplitState(final int state) {
         getNonWithParent().setSplitState(state);
     }

--- a/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/resources/Messages.properties	Wed Jul 05 20:04:04 2017 +0200
+++ b/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/resources/Messages.properties	Fri Oct 10 17:59:22 2014 +0530
@@ -73,6 +73,7 @@
 type.error.not.an.object={0} is not an Object
 type.error.not.a.boolean={0} is not a Boolean
 type.error.not.a.date={0} is not a Date
+type.error.not.a.java.importer={0} is not a JavaImporter object
 type.error.not.a.number={0} is not a Number
 type.error.not.a.regexp={0} is not a RegExp
 type.error.not.a.string={0} is not a String

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nashorn/test/script/basic/JDK-8060101.js	Fri Oct 10 17:59:22 2014 +0530
@@ -0,0 +1,54 @@
+/*
+ * 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.
+ */
+
+/**
+ * JDK-8060101: AssertionError: __noSuchProperty__ placeholder called from NativeJavaImporter
+ *
+ * @test
+ * @run
+ */
+
+var constant = 0.50;
+var ind = 0.0;
+
+// make sure callsites are exercised quite a few times
+// to induce megamorphic callsite for with/JavaImporter
+// combo - which triggered that AssertionError.
+for (var i = 0; i < 50; i++) {
+    var math = new JavaImporter(java.lang.StrictMath);
+    ind += 10.0;
+    with (math) {
+        StrictMath.exp(-constant*ind);
+    }
+}
+
+for (var i = 0; i < 50; i++) {
+    var math = new JavaImporter(java.lang.StrictMath);
+    try {
+        math.Foo();
+    } catch (e) {
+        if (! (e instanceof TypeError)) {
+            throw e;
+        }
+    }
+}