c.kind == Kinds.ERROR ||
c.isError() ||
    public boolean isSubClass(Symbol c) {        return this == c ||             c.kind == Kinds.ERROR ||             closurePos(c) >= 0 ||            this == Global.instance.definitions.ALL_CLASS ||            (this == Global.instance.definitions.ALLREF_CLASS &&             c != Global.instance.definitions.ALL_CLASS &&             c.isSubClass(Global.instance.definitions.ANYREF_CLASS));    }