Github user srowen commented on the pull request:
https://github.com/apache/spark/pull/4534#issuecomment-73960255
`Array[Nothing](1)` won't compile by itself, nor will `Seq[Nothing](1)` for
different reasons. `new Array[Nothing](1)` won't be accepted as a `Seq[?]` for
reasons I don't 100% get.
But there is actually still the same problem with the `Null` type:
`sc.parallelize(Seq(null), 1).isEmpty` still fails. The change above is good
but doesn't fix this case. Back to the drawing boards...
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