ES.48: to-crash-or-not-to-crash "Surprised? I’m just glad I didn’t crash the program."

[andim2]

((possibly a minor item - or maybe exactly not...))

That example likely firmly is UB (fully intentionally, of course, in this casting example).

Thus, wording
"Surprised? I’m just glad I didn’t crash the program."
possibly is exactly what one would NOT want to see written in such guidelines docs.

If an application is entering UB, then it possibly better should firmly/cleanly crash (full stop! Fail-Fast), in order to not proceed beyond (continue with!) now-tainted (corrupted) application state (within an application that might be up to life-or-death handling reliability severity level, yet now keeps spewing/furthering CORRUPTION, possibly even to persistence layers).

Related: E.26: If you can’t throw exceptions, consider failing fast

While desired behaviour (termination, continuation) may vary according to application reliability requirements, such a blanket statement better should not be mentioned.

So, "glad I didn't crash" probably insinuates a wrong/dangerous kind of thinking here, and if so should be usefully reworded or eliminated.

Thanks!