Earlier quoted context omitted.
Or maybe: “I hope they improve and nobody loses their job”
Agreed. You can be sure that whomever was involved with the bug will probably never make that mistake again.
So which one will it be?
On a more serious note: this really depends on the person in question. Not everyone has that state of mind it takes to be extra wary when you find yourself in a similar situation where it went worng before. I've worked with people who made pretty severe mistakes, were pointed out, nodded 'yes', only to just make the exact same programming mistake a few months later. And again, and again.