erikerlandson commented on a change in pull request #28983:
URL: https://github.com/apache/spark/pull/28983#discussion_r451206954
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects/objects.scala
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@@ -678,6 +678,9 @@ object MapObjects {
elementType: DataType,
elementNullable: Boolean = true,
customCollectionCls: Option[Class[_]] = None): MapObjects = {
+ if (function == null) {
+ throw new UnsupportedOperationException("Cannot instantiate MapObjects
with null function")
+ }
Review comment:
The particular reason this happened to me should no longer be possible.
I'm not aware of any other path for it to happen, but leaving an informative
exception message, or at least a code comment to annotate the non-null
assertion, seems like good defensive programming.
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