Invalid token q.js?v=1588706333081:854 Invalid token

[Frank Pedroza]

I'm running into an error and I'm not sure what's causing it. The call is resulting in an "Invalid token" console message coming from line 854 from q.js. I'm running q@1.5.1. The value of value in the following code appears to be "Invalid token". I'm at a loss as to how to debug this issue. Any thoughts would be appreciated.

Promise.prototype.then = function (fulfilled, rejected, progressed) {
    var self = this;
    var deferred = defer();
    var done = false;   // ensure the untrusted promise makes at most a
                        // single call to one of the callbacks

    function _fulfilled(value) {
        try {
            return typeof fulfilled === "function" ? fulfilled(value) : value;
        } catch (exception) {
            return reject(exception);
        }
    }

[Wout Mertens]

• q doesn't log anything to console, so it's likely an uncaught exception? You'll have to paste the entire stack to know.
• You might be better off switching your code to Promise, which has native support and therefore better error management.