recursion bug on valid JSON schemas

[chasetec]

I have a JSON v4 schema that validates with the JSON meta-schema but causes docson to crash with an infinite recursion bug.

{
"myDate": {
            "properties": {},
            "type": "string",
            "pattern": "([0-9][0-9][0-9][0-9])-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])T([0-1][0-9]|2[0-3]):([0-5][0-9]):([0-5][0-9]).([0-9][0-9][0-9])Z",
            "description": "some description"
        }
}

The issue is caused by having an empty "properties" on a string. The JSON meta schema implies that all types have a default of an empty properties value. The spirit of the human readable spec seems to imply that it would be silly to add properties to a string or array or other primitive type. Since the meta-schema validates the above schema it would be nice if docson ignored the silly things.