Strange behavior in nested objects with optimistic types set to true

[Vivin Suresh Paliath]

This is on JDK 8u102. We're seeing strange behavior where certain certain
properties on objects get set to zero. Here's the script:

var config = {};

var creativeDetails = {
    fanpage_id: config.fanpage_id || "293867224112667",
    image_url: config.image_url || "http://some.url",
    title: config.title || "Ad Title",
    description: config.description || "Ad Description",
    link_description: config.link_description || "Link Description",
    call_to_action: config.call_to_action || "LEARN_MORE",
    destination_url: "http:/some.url",
    link_body: config.link_body || "Link Body"
};

var linkData = {
    call_to_action: {
        type: creativeDetails.call_to_action,
        value:{
            link_caption: creativeDetails.link_description,
            link: creativeDetails.destination_url
        }
    },
    link: creativeDetails.destination_url,
    picture: creativeDetails.image_url,
    message: creativeDetails.description,
    name: creativeDetails.title
};

print(JSON.stringify(linkData, null, 4) + "\n");

Running this with jjs without any arguments gives:

{
    "call_to_action": {
        "type": "LEARN_MORE",
        "value": {
            "link_caption": "Link Description",
            "link": "https://hosted-form-service.sbsp.io/"
        }
    },
    "link": "https://hosted-form-service.sbsp.io/",
    "picture": "
http://res.cloudinary.com/infusionsoft/image/upload/v1474490027/1913264_293881764111213_2626449405773452232_o_gxgeoe.png
",
    "message": "Ad Description",
    "name": "Ad Title"
}

Whereas running it with jjs --optimistic-types=true gives:

{
    "call_to_action": {
        "type": "LEARN_MORE",
        "value": {
            "link_caption": "Link Description",
            "link": "https://hosted-form-service.sbsp.io/"
        }
    },
    "link": 0,
    "picture": 0,
    "message": 0,
    "name": 0
}

Changing the || expressions to ternaries didn't change the behavior.
However, referencing a property of the creativeDetails object in any manner
(e.g., assigning it to another variable or printing it out) before
initializing the linkData object, ends up printing out the expected result.

The strange thing is that the nested object gets the right values, but the
outer object does not. This behavior only shows up if you are using the
problematic object's properties to initialize the properties of a nested
object. For example, the following code does not cause the issue:

var linkData = {
    link: creativeDetails.destination_url,
    picture: creativeDetails.image_url,
    message: creativeDetails.description,
    name: creativeDetails.title
};


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