Is “delete p; p = NULL(nullptr);” an antipattern?

Question

Searching something on SO, I stumbled across this question and one of the comments to the most voted answer (the fifth comment to that most voted answer) suggests that del

Answer 1

No, it's not an anti-pattern.

Setting a pointer to NULL is a perfectly good way of indicating that the pointer is no longer pointing at anything valid. In fact, that's exactly what NULL value is intended to mean.

If there's an anti-pattern to be avoided here, the anti-pattern would be not having a simple and well-defined set of rules/conventions for how your program manages its memory. It doesn't matter so much what those rules are, as long as they work to avoid leaks and crashes, and as long as you can and do follow them consistently.