Github user markhamstra commented on the issue:
https://github.com/apache/spark/pull/22039
> Yes, "quick hack", but, as opposed to what in these specific cases?
Yes, that is the key question. I'll admit, I haven't looked at all deeply
to try to figure out whether something better is possible, so this is just my
knee-jerk reaction: If you don't have to, then don't use a catch-all just to
silence the compiler warning. If you're satisfied that there isn't a better
option, then I'll accept that second-best is the best we can do here.
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