Hudson: Is this gonna be a standup fight, sir, or another bughunt?
Gorman: All we know is that there's still no contact with the colony, and that a xenomorph may be involved.
Frost: Excuse me sir, a-a what?
Gorman: A xenomorph.
Hicks: It's a bughunt.

-- Aliens, 1986

These subsystems need rethinking and revision and refactoring, because:

• hashes
  • the Hash PMC is too entertwined with the guts of src/hash.c which knows too much about the internals of Hash PMCs
  • it's not clear if the hash/bucket algorithm is sufficiently collision free
  • OrderedHash is a mess of semantics and implementation
  • some Parrot systems need C-like hashes while user-visible parts of Parrot need PMC-ish hashes