Wikimedia Bugzilla is closed!

Was testing some inheritance, and when I've removed a label, it's still in the output:

<templatedata>
{
        "description": "Testing inheritance",
        "params": {
                "a": {
                        "label": "A",
                        "description": "aaa",
                        "required": true,
                        "inherits": "b"
                },
                "b": {
                        "required": true,
                        "inherits": "c"
                },
                "c": {
                        "required": true,
                        "inherits": "d"
                },
                "d": {
                        "label": "D",
                        "required": true,
                        "inherits": "a"
                }
        }
}
</templatedata>

results in http://i.imgur.com/WrknHsI.png

tested on http://en.wikipedia.org/wiki/Template:Main