Nuclear Gandhi is an urban legend. Turns out there was no such bug in Civ 1.

And in more recent games where there is Nuclear Gandhi it's because of that legend.

If you write a game in a decent language where such a thing won't happen by mistake you can still have it be present on purpose and in some cases that even fits the game's lore.

Random glitches are confusing and bad. Falling off the world in Blue Prince due to collision bugs is annoying for example. However "glitches" which are intended behaviour are fun. I've enjoyed every time I saw somebody get that note and gift from Mrs Babbage because they drafted that particular room in that particular place and it had an effect which in hindsight they now realise was both foreseeable and regrettable...

I know. The urban legend would still not be a thing.