Trace stack traces when a promise resolves.

StackPromise.js

class StackPromise extends Promise {
    constructor(args) {
        super((myresolve, myreject) => 
        {
            let fn = function(result) {
                console.log(new Error("Promise resolved").stack);
                myresolve(result);
            }
            args.call(null, fn, myreject );

        });
    }
}
global.Promise = StackPromise;