--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/api/T6431879.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ * @test
+ * @bug 6431879
+ * @summary TreePathSCanner(CompilationUnitTree tree, P p) overloading forces use of most specific type
+ */
+
+import java.io.*;
+import java.util.*;
+import javax.tools.*;
+import com.sun.source.tree.*;
+import com.sun.source.util.*;
+import com.sun.tools.javac.api.*;
+
+public class T6431879 {
+    public static void main(String... args) throws IOException {
+        String testSrc = System.getProperty("test.src", ".");
+        String testClasses = System.getProperty("test.classes", ".");
+        JavacTool tool = JavacTool.create();
+        StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null);
+        Iterable<? extends JavaFileObject> files =
+            fm.getJavaFileObjectsFromFiles(Arrays.asList(new File(testSrc, T6431879.class.getName()+".java")));
+        JavacTask task = tool.getTask(null, fm, null, null, null, files);
+        Iterable<? extends CompilationUnitTree> trees = task.parse();
+        TreeScanner<Void,Trees> dependencyScanner = new DependencyScanner();
+        Trees treeUtil = Trees.instance(task);
+        for (CompilationUnitTree unit : trees) {
+            //System.err.println("scan " + unit);
+            dependencyScanner.scan(unit, treeUtil);
+        }
+
+    }
+
+    private static class DependencyScanner<R,P> extends TreePathScanner<R,P> {
+        public R visitIdentifier(IdentifierTree tree, P p) {
+            //System.err.println(tree);
+            return null;
+        }
+    }
+}