The fundamental issue is people not understanding (or at least not applying their knowledge of) implicit conversions in C, and I'm entirely unsurprised that MySQL ran afoul of the rules. I had to emulate the MySQL password code in an asynchronous client library several years ago. I took one look at MySQL's code and my head spun. It's classic I-know-enough-C-to-be-dangerous. I translated to paper the algorithm that it was attempting, poorly, to implement, and then promptly purged my mind of the actual code so it wouldn't infect my own implementation.
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