--- a/nashorn/src/jdk/nashorn/internal/runtime/ScriptFunction.java	Wed Jan 30 12:26:45 2013 +0100
+++ b/nashorn/src/jdk/nashorn/internal/runtime/ScriptFunction.java	Wed Jan 30 17:52:54 2013 +0530
@@ -892,7 +892,7 @@
 
     @SuppressWarnings("unused")
     private static Object newFilter(final Object result, final Object allocation) {
-        return result instanceof ScriptObject ? result : allocation;
+        return (result instanceof ScriptObject || !JSType.isPrimitive(result))? result : allocation;
     }
 
     /**

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nashorn/test/script/basic/JDK-8007132.js	Wed Jan 30 17:52:54 2013 +0530
@@ -0,0 +1,54 @@
+/*
+ * 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-8007232: Java objects returned from constructor functions are lost
+ *
+ * @test
+ * @run
+ */
+
+function Func() {
+    return new java.util.HashMap();
+}
+
+var f = new Func();
+if (! (f instanceof java.util.Map)) {
+    fail("instance of java.util.Map expected")
+}
+
+function check(obj) {
+    if (typeof obj != 'object') {
+        fail("expected 'object' but got " + (typeof obj));
+    }
+}
+
+// check primitive returning constructors
+check(new (function() { return 22; }));
+check(new (function() { return false }));
+check(new (function() { return "hello" }));
+
+// check null and undefined returning constructors
+check(new (function() { return null; }));
+check(new (function() { return undefined; }));