diff -r 000000000000 -r 9a66ca7c79fa test/tools/javac/unicode/UnicodeCommentDelimiter.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/tools/javac/unicode/UnicodeCommentDelimiter.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2002 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
+ * @summary unicode escapes delimiting and inside of comments
+ *
+ * @compile UnicodeCommentDelimiter.java
+ */
+
+class UnicodeCommentDelimiter {
+    public static void main(String[] args) {
+        // no error on the following line because although \u005c
+        // represents a backslash, that cannot be considered to begin
+        // a unicode escape sequence.
+        // \u005c000a xyzzy plugh;
+
+        // no error on the following line because there are an even
+        // number of backslashes before the u, meaning it is not a
+        // unicode escape sequence.
+        // \\u000a xyzzy plugh;
+
+        // However, unicode escaped characters can delimit comments.
+        \u002f\u002f xyzzy plugh;
+
+        // \u000a class plugh{}
+        plugh xyzzy;
+    }
+}