alt Hacker NewsIn C / C++ there are two kinds of undefined behaviour. One is where there is written in standard what UB is. Another one is everthing else that is not in standard.
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thaumasiotes • yesterday at 6:58 AM
Technically, that's only one kind, because it's written in the standard that anything not mentioned in the standard is undefined behavior.
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https://en.wikipedia.org/wiki/There_are_unknown_unknowns