Here’s a hypothesis - you don’t need the buffer overflow - you’re already on god mode, with perfect free will. Your consciousness resides in the ideal timeline for your consciousness, and you are actually immortal. Sure, other people may see you reach an unfortunate end, and you will see the same of others - but that’s just the instance of you in their simulation, or your instance of them in your simulation.

So far, my confirmation bias has not been quashed by my experiences, as I have survived a great many things that I would not have expected to. Of course, one day, you will witness my demise - but from my perspective, the show will go on, forever, or until I am sufficiently mature to graduate from this reality.

Again, we never witness this, until it happens to ourselves, as in each of our realities we are the centre of our own universe.

Of course, this can be disproven by experiencing our own death, but nobody has yet reported back on that one.

If clinical immortality gets conveniently invented just in time to make you immortal on your death bed, it would be a hell of a giveaway that something is up though (because timelines where that happens would be the only ones where the subjective experience of being you continues that long).