can NaN be used as a default param value?

[75lb]

If I set NaN as a default param value (see param 3 below)...

/**
 * Example.
 *
 * @param {number} arg1=1
 * @param {number} arg2=something
 * @param {number} arg3=NaN
 */
function example (arg1, arg2, arg3) {}

...then, in the explain output the defaultValue is returned as null - a different value.

[
    {
        "comment": "/**\n * Example.\n *\n * @param {number} arg1=1\n * @param {number} arg2=something\n * @param {number} arg3=NaN\n */",
        "meta": {
            "range": [
                111,
                149
            ],
            "filename": "issue-170.js",
            "lineno": 8,
            "columnno": 0,
            "path": "/Users/llobrook/Documents/jsdoc2md/testbed/tmp",
            "code": {
                "id": "astnode100000002",
                "name": "example",
                "type": "FunctionDeclaration",
                "paramnames": [
                    "arg1",
                    "arg2",
                    "arg3"
                ]
            }
        },
        "description": "Example.",
        "params": [
            {
                "type": {
                    "names": [
                        "number"
                    ]
                },
                "defaultvalue": 1,
                "name": "arg1"
            },
            {
                "type": {
                    "names": [
                        "number"
                    ]
                },
                "defaultvalue": "something",
                "name": "arg2"
            },
            {
                "type": {
                    "names": [
                        "number"
                    ]
                },
                "defaultvalue": null,
                "name": "arg3"
            }
        ],
        "name": "example",
        "longname": "example",
        "kind": "function",
        "scope": "global"
    },
    {
        "kind": "package",
        "longname": "package:undefined",
        "files": [
            "/Users/llobrook/Documents/jsdoc2md/testbed/tmp/issue-170.js"
        ]
    }
]

Is it possible to represent NaN correctly in the returned explain JSON?

[75lb]

Is it safe to assume the null value should be interpreted as NaN if one of the type names for that param is number?