There's no problem with this feature. I don't understand TFA's problem with it. As a programmer I get to not use `unreachable()` if I don't want to, and if I

There's no problem with this feature. I don't understand TFA's problem with it. As a programmer I get to not use `unreachable()` if I don't want to, and if I do I'm happy that the compiler takes my word for it and does the right thing. This is not at all like code elision in UB cases. The `realloc()` change though...