Github user kkrugler commented on the issue:
https://github.com/apache/flink/pull/6101
I'm wondering why, now, we're encountering cases where the `sharedSlot`
value is null? Seems like this could be caused by a deeper problem somewhere,
so just adding the null check is masking something else that should be fixed.
Also, seems like we'd want a test case to verify the failure (pre-fix) and
then appropriate behavior with the fix.---
