Github user mallman commented on the issue: https://github.com/apache/spark/pull/16578 > @mallman (just pure curiosity :) ) how is it possible that this NPE was not found by automated tests? There's no single test case in entire spark suite which verifies scenarios like that described by @snir ? A good question. This probably calls for a new unit test... Presently I'm not feeling too motivated to invest more time in this PR unless and until a reviewer shows some interest in it. The last time I received any feedback from a reviewer was seven months ago. Not a word since. I'm surprised, as my past experience submitting PRs has been nothing like this. Let's try @hvanhovell. He also works on Spark SQL. Herman, any position on this? Thank you.
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