[readthenotes1]

There's an article in IEEE software engineering proceedings around the turn of the millennium that said that defect count was closely associated with any complexity measure you wanted - - including lines of code.

I once said "nearly half of the problems are logic errors, nearly half are misused APIs" and got the retort "and another half are from concurrency".

Of course that as up to nearly 150%, which is probably most people's actual bug count...