debugging - What's the toughest bug you ever found and fixed? -

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what made hard find? how did track down?

not close enough close see also
https://stackoverflow.com/questions/175854/what-is-the-funniest-bug-youve-ever-experienced

a jpeg parser, running on surveillance camera, crashed every time company's ceo came room.

100% reproducible error.

i kid not!

this why:

for doesn't know jpeg compression - image kind of broken down matrix of small blocks encoded using magic etc.

the parser choked when ceo came room, because had shirt square pattern on it, triggered special case of contrast , block boundary algorithms.

truly classic.


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