Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/12157#discussion_r59571111
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/literals.scala
---
@@ -169,6 +169,11 @@ case class Literal protected (value: Any, dataType:
DataType)
override def toString: String = if (value != null) value.toString else
"null"
+ override def hashCode(): Int = {
--- End diff --
I think the test failure is due to this patch, and it's an NPE somewhere.
It could be because a field you're using in a hashCode() is null, and it seems
like can be the case here. Instead of using `.hashCode()`, use
`Objects.hashCode` which handles null.
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