error: Undefined symbol `@`
    at label-scope.asm(3)
error: Undefined symbol `.`
    at label-scope.asm(3)
error: Undefined symbol `..`
    at label-scope.asm(3)
error: Built-in symbol `@` cannot be purged
    at label-scope.asm(12)
error: Built-in symbol `.` cannot be purged
    at label-scope.asm(12)
error: Built-in symbol `..` cannot be purged
    at label-scope.asm(12)
Assembly aborted with 6 errors!