Something wrong with 6.8 Extras in "An Ok Unsafe Queue"

[karakoz]

There are unmodified code from stack implementation after the "Let's steal some iterator impls from the stack:" Compiler yells with:

error[E0599]: no method named `as_deref` found for raw pointer `*mut fifth::Node<T>` in the current scope
   --> src/fifth.rs:110:35
    |
110 |             self.next = node.next.as_deref();
    |                                   ^^^^^^^^ help: there is an associated function with a similar name: `as_ref`
    |
    = note: try using `<*const T>::as_ref()` to get a reference to the type behind the pointer: https://doc.rust-lang.org/std/primitive.pointer.html#method.as_ref
    = note: using `<*const T>::as_ref()` on a pointer which is unaligned or points to invalid or uninitialized memory is undefined behavior

error[E0599]: no method named `as_deref_mut` found for raw pointer `*mut fifth::Node<T>` in the current scope
   --> src/fifth.rs:121:35
    |
121 |             self.next = node.next.as_deref_mut();
    |                                   ^^^^^^^^^^^^ method not found in `*mut fifth::Node<T>`
    |
    = note: try using `<*const T>::as_ref()` to get a reference to the type behind the pointer: https://doc.rust-lang.org/std/primitive.pointer.html#method.as_ref
    = note: using `<*const T>::as_ref()` on a pointer which is unaligned or points to invalid or uninitialized memory is undefined behavior

Which is correct. I think. We should modify the Iter and IterMut impls to use unsafe methods as_ref() and as_mut() like it made in final code. Because Node.next is a raw pointer now. Am I right? And maybe it's worth adding a note about stealing tests for iters?

P.S. I really loved your tutorial. It's wonderful.