JB: "extract superclass" problem in latest eaps

I've been having problems with "extract superclass" where it will
generate a constructor in the extracted class like this:

class Extracted extends OriginalSuper {
public Extracted(String originalSubParam) {
super(null);
}
}

It's passing null to the super constructor, even though the original
class passed whatever was passed to it.

I'm posting this here instead of in the bug tracker because I can't
reproduce it. I thought you should maybe take a look at this code,
because this is a bug that could cause serious and maybe hard-to-find
problems for users.