com.sun.tools.javac.api.ClientCodeWrapper$WrappedJavaFileManager cannot be cast

FULL PRODUCT VERSION :


A DESCRIPTION OF THE PROBLEM :
An exception has occurred in the compiler (1.7.0_02). Please file a bug at the Java Developer Connection (http://java.sun.com/webapps/bugreport) after checking the Bug Parade for duplicates. Include your program and the following diagnostic in your report. Thank you.
java.lang.ClassCastException: com.sun.tools.javac.api.ClientCodeWrapper$WrappedJavaFileManager cannot be cast to com.sun.tools.javac.file.JavacFileManager
at com.sun.tools.javac.main.Main.compile(Main.java:413)
at com.sun.tools.javac.api.JavacTaskImpl.call(JavacTaskImpl.java:132)
at com.sun.tools.javah.JavahTask.run(JavahTask.java:513)
at com.sun.tools.javah.JavahTask.run(JavahTask.java:335)
at com.sun.tools.javah.Main.main(Main.java:46)


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Just starting off with JNI. Occurs when javah is run as an external tool in eclipse.


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package com.redwoodsys.jvolcano.proto;

public class EngineFpgaJni {
public native void set8(int offset, int value);
public native int get8(int offset);
public native void set16(int offset, int value);
public native int get16(int offset);
public native void set32(int offset, int value);
public native int get32(int offset);
}

---------- END SOURCE ----------