> Casting to a pointer from an integer should probably be considered generally unsafe. The pointer can't be assumed to be valid anyway without other guarantees

> Casting to a pointer from an integer should probably be considered generally unsafe. The pointer can't be assumed to be valid anyway without other guarantees. It could have been valid at some point, and then freed at another point, and is now dangling. You'll notice that std::ptr::null and std::ptr::dangling are also safe functions. This is intentional - the language designers are telling you that you cannot rely on the fact that a piece of data is of a pointer type to trust that it's valid.