Thanks for the formatting. I fixed my comment too. As for the bad legibility of the code as written (not due to formatting), where do I start... Oh I know, the

Thanks for the formatting. I fixed my comment too. As for the bad legibility of the code as written (not due to formatting), where do I start... Oh I know, the writer obviously wants very very badly to write this while loop as a one-liner. That's the start of all the other badness. As a reader of this code now, I have to keep every possible combination of post-increment side effects and precedence rules in mind before this code makes sense. And yes, I know code like this is quoted in books as example of how cleverly you can write "powerful" one-liners. As far as I'm concerned, it's just a dumb show of alpha-coder pride and it's not a surprise to me that a serious bug was buried here.