groovyc ant task creates invalid stub

When using the groovyc ant task, on certain conditions builds fail because the generated java stub is invalid.Our best example is when a groovy class inherits from a java class that has a basic type as a constructor parameter. The stub has a constructor that calls super(null, nulll), which fails when using a null type.

------java class----
public class Parent {
private String name;
private int number;

public Parent(String name, int number)

}
--------groovy class-------
class Child extends Parent {
public Child(String name, int number)

}

I've attached a working environment that reproduces the bug. just run the build file.