ref: aa76603da9a1c04835f4a431251f77d481c26bdb
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)!