Is it safe to check if a pointer is null, then dereference it in the same if statement?

Question

Is the following code safe if a null pointer is passed in?

if(ptr && *ptr == value)
{
   //do something
}

Does the order of the checks

Answer 1

If the pointer is invalid (or rather NULL as pointed out), in the first version short-circuiting will prevent the evaluation of *ptr == value, so the first one is safe.

The second one will always access *ptr, whether it is valid or not.