[tgv]

There's no reason for concrete examples, because the point was about the fundamental misguidedness of parser generators, not about problems with individual parser generators or the nice things you can do in a hand-rolled one, but to accommodate you, ANTLR gives one on its home page: "... At Twitter, we use it exclusively for query parsing in Twitter search... Samuel Luckenbill, Senior Manager of Search Infrastructure, Twitter, inc."

Also, regexps are used very often in production, and that's definitely a parser-generator of sorts.

The memory corruption example was an analog, but to spell it out: it's easier and faster to write a correct parser using flex/bison than by hand, especially for more complex languages. Parser-generators have their use, and are not fundamentally misguided. That you might want to write your own parser in some cases does not diminish that (nor vice versa).