JavaBeanConverter does not respect omitted javabean properties

public class Test {
    private int safe;

    public int getSafe() {
        return safe;
    }
    public void setSafe(int s) {
        safe = s;
    }

    public String getUnsafe() {
        throw new RuntimeException();
    }
    public void setUnsafe(String p) {
        // Do something
    }
    
    public static void main(String [] args) throws Exception {
        XStream x = new XStream();
        x.omitField(Test.class, "unsafe");
        x.omitField(Test.class, "safe");
        System.out.println(x.toXML(new Test()));
    }

}