Github user uncleGen commented on the issue:
https://github.com/apache/spark/pull/16370
@zsxwing Thanks for your reminder!!
In some ways, we really can evade this issue, just like not use `-cp`. But
this is an user-side behaviour, we can not ensure every users know and use
correct ways to move data. It may confuse users if they do not know this issue.
Besides, current changes is so tiny that do not have any harm to codes. So,
IMHO, it is OK to add the check for protection. What do you thinkï¼
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