Great.
We could do something this this error which might be easier...
2021/04/29 14:50:47 ERROR : eicar.txt: Failed to copy: failed to open source object: malwareDetected: Malware detected
What would you want it to do? This would be my preference
Skip the file, make an error (so the exit status of rclone is non-zero) but don't do a retry.
Or something else?