Here's one for the #langsec crowd. CloudFlare used a parser generator named Ragel, they didn't parse manually.
Bug was in generated code.
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which is a shame, I was sort of hoping it was :-)
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It's basically regex but with the ability to hook into the state machine. It's really weird and quite neat...
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You don't have to use the C backend though, it knows how to generate other stuff. So it can be memory safe.
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Still, it's really weird, and it's hard to come up with a good suggestion on when it's actually a good idea.
End of conversation
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