(case (sb-kernel:widetag-of object)
(#.sb-vm::value-cell-header-widetag
(call (sb-kernel::value-cell-ref object)))
- #+(and sb-lutex sb-thread)
- (#.sb-vm::lutex-widetag)
(t
(warn "~&MAP-ROOT: Unknown widetag ~S: ~S~%"
(sb-kernel:widetag-of object) object)))))))