error: Symbol "ref" is referenced and thus cannot be purged
    at purge-ref.asm(4)
warning: Purging a label "OK" [-Wpurge]
    at purge-ref.asm(7)
error: Symbol "NotOK" is referenced and thus cannot be purged
    at purge-ref.asm(11)
error: Symbol "EvenLessOK" is referenced and thus cannot be purged
    at purge-ref.asm(15)
warning: Purging a label "Maybe" [-Wpurge]
    at purge-ref.asm(23)
Assembly aborted with 3 errors!