`runToLastAsync` doing infinite loop when `now` is specified to setup clock

[guillaumeduboc]

While working on https://github.com/vitest-dev/vitest/pull/2209 I have an issue with runToLastAsync doing an infinite loop Below you can find a minimal test to reproduce the issue

We understand you have a problem and are in a hurry, but please provide us with some info to make it much more likely for your issue to be understood, worked on and resolved quickly.

• FakeTimers version : 9.1.2

• Environment : MACOS

• Example URL : a minimial reproduction test

• Other libraries you are using: none

What did you expect to happen? An infinite loop shouldn't be possible and this test shouldn't break

What actually happens This test times out

How to reproduce Here is a minimal test to reproduce the issue

        it("new timers created from promises cannot cause an infinite loop when a date is given", function () {
            this.clock = FakeTimers.createClock(Date.now());
            const test = this;
            const spy = sinon.spy();
            const recursiveCallback = function () {
                global.Promise.resolve().then(function () {
                    test.clock.setTimeout(recursiveCallback, 0);
                });
            };

            this.clock.setTimeout(recursiveCallback, 0);
            this.clock.setTimeout(spy, 100);

            return this.clock.runToLastAsync().then(function () {
                assert.isTrue(spy.called);
            });
        });

The error for this test is