RUSTSEC-2026-0409 Use-after-free from a comparator that answers inconsistently

OrderedSkipList, SkipSet and SkipMap can free a node that is still linked when a Comparator or Ord implementation gives different answers for the same pair of values during one mutating call. A later call reads the freed memory CWE-416. A safe impl Ord with the default comparator is enough to rea...