ref: 3ca58e13dcba212bcd024ab172b09bfa712854fb
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)!