Debug Node: TypeError: Cannot read property 'name' of undefined

[DeanCording]

There is a case where the debug node will throw TypeError: Cannot read property 'name' of undefined

A test case involves the httpInMultipart node:

[ {
    "id": "499fe21f.f66814",
    "type": "httpInMultipart",
    "z": "c8dc8a91.74103",
    "name": "OTA Firmware",
    "url": "/esp8266-ota/upload",
    "method": "post",
    "fields": "[{ \"name\": \"firmware\"}]",
    "swaggerDoc": "",
    "x": 155.5,
    "y": 811,
    "wires": [
        [
            "eeb8fd90.56a408",
            "ff8b5370.8bcc78"
        ]
    ]
},
{
    "id": "ff8b5370.8bcc78",
    "type": "debug",
    "z": "c8dc8a91.74103",
    "name": "files",
    "active": true,
    "console": "true",
    "complete": "req.files",
    "x": 735.5,
    "y": 800,
    "wires": []
}
]

The debug node is set to display msg.req.files which is an array of objects containing the files received.

In debug.js, the error is thrown at:

  function sendDebug(msg) {
     ....
     msg.format = msg.msg.constructor.name || "Object";

msg.msg is the output, in this case msg.req.files (Note: the name msg refers to different objects)

msg.req.files.constructor is 'undefined' and therefore does not have a property 'name' - javascript throws an exception rather than return 'undefined' like it would for a defined object.

[DeanCording]

Fix:

        try {
            msg.format = msg.msg.constructor.name;
        } catch (e) {
            msg.format = "Object";
        }