--- /dev/null	2018-09-19 19:35:42.000000000 +0530
+++ new/test/jdk/com/sun/tools/jextract/redundantDecls.h	2018-09-19 19:35:42.000000000 +0530
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2018, 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.
+ */
+
+struct Point;
+struct Point {
+   int i;
+   int j;
+};
+
+struct Point3D {
+    int i;
+    int j;
+    int k;
+};
+struct Point3D;
+
+enum RGBColor;
+enum RGBColor {
+   R, G, B
+};
+
+enum CMYColor {
+  C, M, Y
+};
+enum CMYColor;