pub const fn dangling<T>() -> *const TExpand description
Creates a new pointer that is dangling, but non-null and well-aligned.
This is useful for initializing types which lazily allocate, like
Vec::new does.
Note that the pointer value may potentially represent a valid pointer to
a T, which means this must not be used as a “not yet initialized”
sentinel value. Types that lazily allocate must track initialization by
some other means.