[rkangel]

> To this day I'm still mystified as to why this bug hadn't caused broken interrupts (+ mysterious behavior) or mass panics before then. There must've been some other change to xnu that exposed the bug somehow, but I'll probably never know.

My favourite species of software bugs are the ones that when you find the source you realise the code is fundamentally broken, and you get to investigate how the hell it worked for so long!