--- a/jdk/src/share/classes/sun/security/provider/certpath/BasicChecker.java	Mon Jun 11 07:10:48 2012 -0400
+++ b/jdk/src/share/classes/sun/security/provider/certpath/BasicChecker.java	Fri Jun 15 08:43:31 2012 -0400
@@ -90,6 +90,7 @@
         this.date = date;
         this.sigProvider = sigProvider;
         this.sigOnly = sigOnly;
+        this.prevPubKey = trustedPubKey;
     }
 
     /**

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/security/cert/CertPathBuilder/zeroLengthPath/ZeroLengthPath.java	Fri Jun 15 08:43:31 2012 -0400
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2012, 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.
+ */
+
+/**
+ * @test
+ * @bug 4442566 7176326
+ * @summary check that we can build and validate a zero-length
+ *    certpath when a trust anchor cert satisfies the target constraints
+ */
+import java.io.ByteArrayInputStream;
+import java.security.cert.*;
+import java.util.Collections;
+
+public class ZeroLengthPath {
+
+    private static final String ANCHOR =
+        "-----BEGIN CERTIFICATE-----\n" +
+        "MIIBFzCBwgIBATANBgkqhkiG9w0BAQQFADAXMRUwEwYDVQQDEwxUcnVzdCBBbmNo\n" +
+        "b3IwHhcNMDIxMTA3MTE1NzAzWhcNMjIxMTA3MTE1NzAzWjAXMRUwEwYDVQQDEwxU\n" +
+        "cnVzdCBBbmNob3IwXDANBgkqhkiG9w0BAQEFAANLADBIAkEA9uCj12hwDgC1n9go\n" +
+        "0ozQAVMM+DfX0vpKOemyGNp+ycSLfAq3pxBcUKbQhjSRL7YjPkEL8XC6pRLwyEoF\n" +
+        "osWweQIDAQABMA0GCSqGSIb3DQEBBAUAA0EAzZta5M1qbbozj7jWnNyTgB4HUpzv\n" +
+        "4eP0VYQb1pQY1/xEMczaRt+RuoIDnHCq5a1vOiwk6ZbdG6GlJKx9lj0oMQ==\n" +
+        "-----END CERTIFICATE-----";
+
+
+    public static void main(String[] args) throws Exception {
+
+        ByteArrayInputStream is = new ByteArrayInputStream(ANCHOR.getBytes());
+        CertificateFactory cf = CertificateFactory.getInstance("X.509");
+        X509Certificate cert = (X509Certificate)cf.generateCertificate(is);
+
+        X509CertSelector xcs = new X509CertSelector();
+        xcs.setSubject(cert.getSubjectX500Principal().getName());
+        PKIXBuilderParameters p = new PKIXBuilderParameters
+            (Collections.singleton(new TrustAnchor(cert, null)), xcs);
+        CertPathBuilder cpb = CertPathBuilder.getInstance("PKIX");
+        CertPath cp = buildCertPath(cpb, p);
+        validateCertPath(cp, p);
+    }
+
+    private static CertPath buildCertPath(CertPathBuilder cpb,
+                                          PKIXBuilderParameters params)
+        throws Exception
+    {
+        CertPathBuilderResult res = cpb.build(params);
+        if (res.getCertPath().getCertificates().size() != 0) {
+            throw new Exception("built path is not zero-length");
+        }
+        return res.getCertPath();
+    }
+
+    private static void validateCertPath(CertPath cp, PKIXParameters params)
+        throws Exception
+    {
+        CertPathValidator cpv = CertPathValidator.getInstance("PKIX");
+        CertPathValidatorResult cpvr = cpv.validate(cp, params);
+    }
+}