ref: 75ce230dced14c4a622d20e41738474193a8817a
dir: /test/asm/purge-ref.err/
ERROR: purge-ref.asm(4): Symbol "ref" is referenced and thus cannot be purged ERROR: purge-ref.asm(11): Symbol "NotOK" is referenced and thus cannot be purged ERROR: purge-ref.asm(15): Symbol "EvenLessOK" is referenced and thus cannot be purged error: Assembly aborted (3 errors)!