Things like the Carlo Verre hack (also a thing you can't change —any more— in Python: builtins), editing objects during their construction (via e.g. gc)... gene

Things like the Carlo Verre hack (also a thing you can't change —any more— in Python: builtins), editing objects during their construction (via e.g. gc)... generally, the gc module allows other ways as well to crash your interpreter. >>> import gc >>> 'foo'.lower() >>> gc.get_referents(str.__dict__)[0]['lower'] = str.upper >>> 'foo'.lower() segmentation fault (core dumped) python (That's the method lookup cache) A talk in this direction is https://www.youtube.com/watch?v=qCGofLIzX6g https://www.youtube.com/watch?v=qCGofLIzX6g