Asynchronous evalJS() result only on Android

I am trying to get the HTML of a webview and save it. I have, essentially, the following in my app:

Ti.API.info("save()");
Ti.API.info(1);
var body = view.evalJS("setupSave()");
Ti.API.info(2);
if (!body || body == "" || body == "undefined") {
    Ti.API.info("save(): no body");
}
Ti.API.info(3);

and, in my webview-loaded JS:

function setupSave()
{
    Ti.API.info("setupSave()");
    return document.body.innerHTML;
}

On iOS this works fine, and the output is:

[INFO] save()
[INFO] 1
[INFO] setupSave()
[INFO] 2
[INFO] 3

On Android, however, I get:

save()
1
2
save(): no body
setupSave()

Like that: no "3", and "setupSave()" comes after the "no body" message.

What could explain this out-of-order Ti.API.info() logging, to give me some idea of where to start looking?