--- a/nashorn/src/jdk/nashorn/internal/runtime/ScriptFunctionData.java	Wed Aug 14 20:51:53 2013 +0530
+++ b/nashorn/src/jdk/nashorn/internal/runtime/ScriptFunctionData.java	Fri Aug 16 15:04:36 2013 +0530
@@ -250,9 +250,18 @@
         final int length = args == null ? 0 : args.length;
 
         CompiledFunctions boundList = new CompiledFunctions();
-        for (final CompiledFunction inv : code) {
+        if (code.size() == 1) {
+            // only one variant - bind that
+            boundList.add(bind(code.first(), fn, self, allArgs));
+        } else {
+            // There are specialized versions. Get the most generic one.
+            // This is to avoid ambiguous overloaded versions of bound and
+            // specialized variants and choosing wrong overload.
+            final MethodHandle genInvoker = getGenericInvoker();
+            final CompiledFunction inv = new CompiledFunction(genInvoker.type(), genInvoker, getGenericConstructor());
             boundList.add(bind(inv, fn, self, allArgs));
         }
+
         ScriptFunctionData boundData = new FinalScriptFunctionData(name, arity == -1 ? -1 : Math.max(0, arity - length), boundList, isStrict(), isBuiltin(), isConstructor());
         return boundData;
     }

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nashorn/test/script/basic/JDK-8020355.js	Fri Aug 16 15:04:36 2013 +0530
@@ -0,0 +1,63 @@
+/*
+ * 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-8020355: bind on built-in constructors don't use bound argument values
+ *
+ * @test
+ * @run
+ */
+
+if (Array.bind(null, 2)().length != 2) {
+    fail("Expected Array.bind(null, 2)().length to be 2");
+}
+
+if (RegExp.bind(null, "a")().source.length != 1) {
+    fail("Expected RegExp.bind(null, 'a')().source.length to be 1");
+}
+
+// check user defined functions as well
+
+var res = (function(x, y) { return x*y }).bind(null, 20, 30)();
+if (res != 600) {
+    fail("Expected 600, but got " + res);
+}
+
+var obj = new ((function(x, y) { this.foo = x*y }).bind({}, 20, 30))();
+if (obj.foo != 600) {
+    fail("Expected this.foo = 600, but got " + res);
+}
+
+// try variadic function as well
+
+var res = (function() { return arguments[0]*arguments[1] }).bind(null, 20, 30)();
+if (res != 600) {
+    fail("Expected 600, but got " + res);
+}
+
+var obj = new ((function(x, y) { this.foo = arguments[0]*arguments[1] }).bind({}, 20, 30))();
+if (obj.foo != 600) {
+    fail("Expected this.foo = 600, but got " + res);
+}
+
+