But it’s still there in plain sight. I’d hazard a guess that this may be the first time a solid code reviewer looked at the code, and spotted it straight away*

But it’s still there in plain sight. I’d hazard a guess that this may be the first time a solid code reviewer looked at the code, and spotted it straight away* If you wanted 10x better, you could throw in some code that exhibits undefined (but known on major compilers) behavior, or super subtle C issues. Even a simple if statement in C forces all kinds of wonderful promotions and type conversions which can truncate, wrap, and drastically change values in ways that even most C developers aren’t aware. I encourage folks to go check out the “underhanded C contest” before suggesting that this bug is a backdoor. *The person who found this, Peter, is indeed insanely good.