Constant Javascript errors

[mlb5000]

I've been running go-webkit2 for a little while, and every once in a while I'll run into an issue where trying to run just simple Javascript (e.g. window.location.href) results in a constant string of

"An exception was raised in JavaScript"

even after waiting and retrying. I found exactly one place in WebKit2 where this message can originate but the full context for the failure eludes me.

What does this message actually mean when running such simple Javascript, and how can I get around it?

[mlb5000]

It doesn't happen EVERY time, just intermittently.